#1 Home Improvement Retailer

Internet # 331594775

Model # R8720B-AC8400802

18V SubCompact Brushless 3/8 in. Right Angle Impact Wrench with 2.0 Ah Battery

$278.00
Apply Now
Pay $253.00 after $25 OFF your total qualifying purchase upon opening a new card. info
Apply for a Home Depot Consumer Card
  • Includes: 18V SubCompact Brushless Right Angle Impact Wrench
  • Includes: 18V 2.0 Ah Lithium-Ion Battery
  • Free Parts and Service for Life with Registration

Free & Easy Returns In Store or Online

Return this item within 90 days of purchase.

Read Return Policy

Get an immediate answer with AI

AI-generated from the text of manufacturer documentation. To verify or get additional information, please contact The Home Depot customer service.

Product Details

About This Product

RIDGID introduces the R8720B 18V SubCompact Brushless 4-Mode 3/8 in. Right Angle Impact Wrench with 2.0 Ah Battery. The RIDGID SubCompact Brushless lineup pairs powerful brushless motor technology in a compact tool design. This powerful brushless motor delivers best in class power with up to 250 ft./lbs. of breakaway torque and is the most compact right angle impact wrench in its class. Making it the perfect choice for tight spaces and hard-to-reach areas. Engineered with maximum productivity in mind, it was designed with 3-speeds and an auto-tightening mode for ultimate user control during fastening and removing applications. It also features LED light for improved visibility in low light situations. As always, this RIDGID 18V SubCompact Brushless Right Angle Impact Wrench is 100% compatible with all RIDGID 18V batteries. Best of all, this tool is eligible for the Industry's Best Lifetime Service Agreement, simply register within 90 days of purchase for FREE Parts, FREE Service, FOR LIFE. The RIDGID Right Angle Impact Wrench includes a 2.0 Ah Battery. Charger sold separately.

Highlights

  • Lightweight Design. Heavyweight Performance.
  • Pair with MAX Output batteries for maximum power
  • Powerful Brushless Motor delivers best in class power with up to 250 ft./lbs. of breakaway torque
  • Most compact in class
  • 3 speeds + auto-tightening mode provides adjustable power and speed
  • Auto-tightening auto-stops when fastening to prevent over tightening bolts
  • Auto-tightening in reverse, delivers full breakaway torque, then stops when the bolt is loose
  • 3/8 in. Anvil
  • LED light for improved visibility in low-light situations
  • Compatible with RIDGID’s AC13B06 Protective Boot (sold separately)
  • 100% Compatible: Works with all RIDGID 18V Batteries, Tools, and Chargers
  • Lifetime Service Agreement with Registration within 90 Days
  • Includes: R8720 18V SubCompact Brushless 4-Mode 3/8 in. Right Angle Impact Wrench
  • Includes: (1) 2.0 Ah Lithium-Ion battery and operator's manual
  • Charger sold separately
  • RIDGID: Built for a Lifetime
  • Click here for more information on Electronic Recycling Programs
  • Return Policy
  • California residents
     see Prop 65 WARNINGS

Product Information

Internet # 331594775

Model # R8720B-AC8400802

Additional Resources

Shop All RIDGID

Specifications

Dimensions: H 17 in, W 2.4 in, D 2.2 in

Dimensions

Drive Size (in.)

3/8

Product Depth (in.)

2.2 in

Product Height (in.)

17 in

Product Width (in.)

2.4 in

Details

Amperage (A)

0.0 A

Batteries Included

Yes

Battery Amp Hours

2 Ah

Battery Power Type

Lithium Ion

Battery Size

18-volt

Battery Voltage (V)

18V

Charger Included

Charger Not Included

Color Family

Orange

Condition

New

Cordless Tool Type

Impact Wrench

Cordless/Corded

Cordless

Impacts Per Minute

3800

Included

No Additional Items Included

Maximum Speed (RPM)

3200 RPM

Motor Type

Brushless

Number of Total Batteries Included

1

Power Tool Features

Cushioned Grip, Forward/Reverse Switch, LED Light, Lockout Power Switch, Reverse, Sub-Compact, Variable Speed

Product Weight (lb.)

3.1 lb

Returnable

90-Day

Tools Product Type

Power Tool

Torque (lb-in)

3000 In lbs

Warranty / Certifications

Certifications and Listings

UL Listed

Manufacturer Warranty

Lifetime Service Agreement

Questions & Answers

I have a Dual Battery Charger #140276002. The RED indicator light on the left side starts to blink immediately upon plugging the unit into a power socket. The RED light on the right is just on. Right side charges. The Left side does not. Why?
ByDec 7, 2024
1 Answer | 
Answer This Question

Hello, Vhoff - It sounds like there is an issue with your charger. For further assistance, please reach out to us by phone or text at 1.866.539.1710, Monday - Friday from 9 am to 5 pm (EST), or via email when you visit us at https://register.ridgidpower.com/contact. This question is from RIDGID 18V 2.0 Ah Lithium-Ion Battery (AC8400802).

By|Dec 9, 2024
    0/0


    Will this battery replace the Cat# 44698 battery?
    ByJan 26, 2024
    1 Answer | 
    Answer This Question

    Hello, Brain - No, this does not replace that battery. We hope this helps! If you need further support, then call or text us at 1.866.539.1710, Monday - Friday from 9 am to 5 pm (EST), or through email when you visit us at https://register.ridgidpower.com/contact.

    By|Jan 30, 2024
      0/0


      You list the max "breakaway" torque, but what is the max "tightening" torque? Many impact wrenches have less tightening torque, than breakaway torque.
      ByDec 30, 2023
      2 Answers | 
      Answer This Question

      Torque test channel on YouTube did a test and the biggest measurement was 266 ft-lbs in reverse on a left hand thread bolt

      By|Feb 26, 2024
        0/0

        Hello, Needtoknow - Thank you for your question. Unfortunately, we do not have the tightening torque listed. I hope this helps! Additionally, if you need further support, then a RIDGID Customer Experience Professional is here for you, Monday - Friday from 9 am to 6 pm (EST) when you call or text us at 1.866.539.1710 or through email when you visit us at https://register.ridgidpower.com/contact. And thank you again for your interest in the 18V SubCompact Brushless 3/8 in. Right Angle Impact Wrench (Tool Only). - Emily

        By|Jan 4, 2024
          0/0


          RIDGID please MAKE a 1/4 inch drive.
          ByDec 1, 2023
          2 Answers | 
          Answer This Question

          I'm not sure if this answers your question but I purchased the 3/8 version so I could step up to a half inch or step down to a 1/4 inch if I needed to with adapters.

          By|Dec 16, 2024
            0/0

            (3)

            Hello, Nate - Thank you for your question. We value your opinion and strive to introduce products that our customers find innovative and affordable. Our team of developers are always creating exciting and new products as well as improving existing products through feedback such as yours. I will document your feedback in our system so it can be directed to the proper channels through reporting. Additionally, if you need further support, then a RIDGID Customer Experience Professional is here for you, Monday - Friday from 9 am to 6 pm (EST) when you call or text us at 1.866.539.1710 or through email or live chat when you visit us at https://register.ridgidpower.com/contact. And thank you again for your interest in the 18V SubCompact Brushless 3/8 in. Right Angle Impact Wrench (Tool Only). - Joyce

            By|Dec 3, 2024
              0/0

              (1)

              Ridgid battery 18volt 2 amp are can I use a bigger amp battery are can I use bigger amp in them
              ByNov 7, 2023
              1 Answer | 
              Answer This Question

              Hello, Charlie - Thank you for your question. Yes, you can purchase larger amp batteries and use them in your tools. I hope this helps! Additionally, if you need further support, then a RIDGID Customer Experience Professional is here for you, Monday - Friday from 9 am to 6 pm (EST) when you call or text us at 1.866.539.1710 or through email or live chat when you visit us at https://register.ridgidpower.com/contact. And thank you again for your interest in the 18V 2.0 Ah Lithium-Ion Battery. - Jesse

              By|Dec 3, 2024
                0/0

                (1)

                Can I use Ridgid R87002 baattery on a Ridgid R860720 Fan
                ByJul 13, 2023
                1 Answer | 
                Answer This Question

                Hello, Ralph - Thank you for your question. Yes, all RIDGID 18v batteries will work in all RIDGID 18v tools. I hope this helps! Additionally, if you need further support, then a RIDGID Customer Experience Professional is here for you, Monday - Friday from 9 am to 6 pm (EST) when you call or text us at 1.866.539.1710 or through email or live chat when you visit us at https://register.ridgidpower.com/contact. And thank you again for your interest in the 18V 2.0 Ah Lithium-Ion Battery. - Vini

                By|Sep 18, 2023
                  0/0


                  Can this battery be charged using a Rigid 140319001 Charger (originally purchased as part of A Ni-Cad Battery Combo Drill, Saw, Flashlight kit)
                  ByMay 31, 2023
                  1 Answer | 
                  Answer This Question

                  Hello, Rayk - Thank you for your question. I am sorry, no. You cannot charge a Lithium-Ion battery on a Ni-Cad charger. I hope this helps! Additionally, if you need further support, then a RIDGID Customer Experience Professional is here for you, Monday - Friday from 9 am to 6 pm (EST) when you call or text us at 1.866.539.1710 or through email or live chat when you visit us at https://register.ridgidpower.com/contact. And thank you again for your interest in the 18V 2.0 Ah Lithium-Ion Battery. - Vini

                  By|Dec 3, 2024
                    0/0

                    (2)

                    Can the 2.0 AH battery be used in place of the 4.0Ah battery?
                    ByFeb 25, 2023
                    2 Answers | 
                    Answer This Question

                    Yes it can. Think of the battery as the gas tank of your car. Doesn?t matter if you have a 10 gallon tank (2.0Ah) or a 20 gallon tank (4.0Ah) the power is the same only you won?t drive or power the tool as long.

                    By|Jul 9, 2023
                      0/0

                      Hello, Rogpet - Thank you for your question. Yes, this battery is compatible with all RIDGID 18v tools. I hope this helps! Additionally, if you need further support, then a RIDGID Customer Experience Professional is here for you, Monday - Friday from 9 am to 6 pm (EST) when you call or text us at 1.866.539.1710 or through email or live chat when you visit us at https://register.ridgidpower.com/contact. And thank you again for your interest in the 18V 2.0 Ah Lithium-Ion Battery. - Jewel

                      By|Feb 28, 2023
                        0/0


                        Viewing 1-8 of 12

                        Customer Reviews

                        4.6 out of 5

                        • 4.6 out of 139 reviews
                        • 96% recommend this product
                        What Customers Say
                        Summarized by generative AI from text of customer reviews

                        Customers say the RIDGID 18V 2.0 Ah Lithium-Ion Battery is a reliable and powerful addition to their tool collection, offering long-lasting performance and a convenient fuel gauge feature. Users appreciate its lightweight design and compatibility with various RIDGID tools, although some noted the absence of a rubber pad on the bottom, which could affect stability. Overall, the battery's durability and three-year warranty enhance its appeal, making it a solid choice for both DIY enthusiasts and professionals.

                        Filter by:
                        Showing 1-10 of 139 reviews
                        The description said it was compatible with all 18V Ridgid tools, but it does not fit the 18V Ridgid ProPress. They need to clear about what they're selling, completely wasted my technicians time as well as mine.
                        by
                        This review is from 18V 2.0 Ah Lithium-Ion Battery
                        Response from RIDGIDApr 8, 2025
                        Hello, Michael - We are sorry to hear about your frustrating experience. These batteries are compatible with all RIDGID power tools, not the piping/plumbing tools. We hope this provides clarity. And feel free to email us anytime at Reviews@RIDGIDmail.com, if you'd like to continue this conversation. ridgidtti
                        • Verified Purchase
                        I took some measurements
                        With an astro 3/8 nano socket the total length is 3-1/4. With a 1/2 drive adapter the total length is 2-3/4 plus the length of your socket.
                        by
                          • Recommended
                          1 found this review helpful
                          Work great for hard to reach bolts and nuts
                          by
                          • Verified Purchase
                          Oh So Handy, Powerful and Timesaving
                          Unbelievably handy. This makes so many things easier to do. So of the jobs that I dreaded doing, I now look forward ti doing because of this tool. There are so many places that an impact would be handy and faster, but they just wouldn't fit. Some of the ratchets would fit, but they weren't strong enough to break many fasteners loose. This one goes up to 250ft/lbs. That's a big step up. It uses the common 18v RIDGID batteries. It has a variable speed trigger, settings may be changed for different speeds. It also has an Auto Mode that shuts off as soon as the tool starts impacting, to prevent overtightening and in reverse shuts down once impacting has finished. It's very well made and will be a great addition to any toolbox.
                          by
                          • Recommended
                          Plenty of power in a small tool
                          The Ridgid 18V Sub-Compact Brushless 3/8" right angle impact wrench is a well built sturdy professional heavy duty grade tool. The 3/8" version, paired with a 4Ah battery is perfectly balanced, although 2Ah battery will be perfectly adequate for a whole day professional work and will provide the maximum torque rating of 250 ft-lbs (339 Nm). The tool makes up to 3,800 impacts per minute, variable using the large progressively stepping up two finger switch. It's not a paddle switch, and it does not have a redundant safety mechanism, but it is very tactile and provides enough feedback. With it you excellent control in the low RPMs, which actually sold me on the product as I usually need better control for smaller bolts which can be prone to overtightening. It is a huge timesaver and well protected on all sides from drops, with a hard beefy glass filled nylon shell with a butadiene rubber overmould in the area of grip. It's resistant to oils, brake fluid, coolant and AC POE type oils and other corrosives. The tool has open vents to provide better cooling, so it has to be protected from some debris, although naturally the airflow allows for self cleaning of the tool. Machining on all parts is just great and serviceability is phenomenal - you can also open the gear for proper servicing and lubrication and the head features a non-stick coating and very low profile of just shy of 3" from the back to the anvil and 2.5" wide. With a low profile socket you can get to about 3.5" of working space needed. The RPM selector has LED indicators for the level and after powering down it stays on the selected level. As with all other Rigid torque wrenches, the Auto-level is somewhat set and forget, as it pairs the RPMs and torque best and reaches max very fast yet progressively enough to save time. Auto goes up to 2,100 RPM. Level 1 goes up to 1,600 rpms for more torque sensitive jobs. Level 2 goes up to 2,400 and the highest, level 3 goes up to 3,200. Anvil is machined from high grade carbon steel and has a retaining ring, which holds the sockets with precise amount of retention so that they are easy to put in yet not too hard to take out. There is a very bright LED which focuses light on the working area in front of the anvil. The brushless motor gives plenty of torque for both tightening and loosing nuts and bolts, but I think where this tool shines is how it manages power - it delivers full torque, but stops when the bolt/nut becomes loose. In Auto, during tightening, it delivers full power which stops after the bolt/nut is tight enough, yet it gives you the option to overtighten in higher setting. Combined with the lifetime service agreement and extended warranty, this is unbeatable deal right now and a powerful helper in every garage or professional mechanic shop. The product comes insulated on all sides in a sturdy cardboard package which is safe for online ordering and delivery.
                          by
                          • Recommended
                          2 found this review helpful
                          well balanced adjustable speed 3/8 drive brushless compact right angle Impact
                          the sleek right angle Ridged 3/8 subcompact impact is great for tight places . the RIDGID 18V SubCompact Brushless 3/8 in. Right Angle Impact. is brushless and 4 speed reversable. the unit rated at 0 -800 RPM also can be switched to 600 0-1 /0-2 400/ 0-3 200 RPM. this was just the impact not the kit we received . the Ridgid lifetime Warranty is standard if you register the tool . or 3 year if from date of manufacture. to me the weight is perfectly balanced when attached to a ridgid battery. one more nice thing we really like is you can attach a optional belt clip.
                          by
                          • Recommended
                          4 modes, compact and easy to use
                          I am restoring two 1960s Chevrolet vehicles and wanted a cordless right angle impact wrench to fit in tight places. This right angle impact wrench beats out the competition. It is lighter, more compact, and something none of the competition has - a 4 mode switch. With the 4ah battery installed, the wrench is evenly weighted and easy to maneuver. Ironically the first time I used it was to put together some furniture I bought at home depot. What I really like on this impact wrench is the mode selector 1 - Low, 2 - medium, 3 – high, and A- Auto Mode. By having these modes, it controls the speed of the wrench. I predominately use Auto Mode because this tool has a variable trigger and this mode offers protection from over-tightening. As soon as you pull the trigger, the mode lights up so you know what mode you are on. Also as soon as you pull the trigger the light comes on – super handy! I haven’t yet had a completely frozen bolt, but on the tougher ones, this tool makes it easy to loosen. This is one of those tools that you say “Why didn’t I get it sooner?” A well designed tool with great features – highly recommend.
                          by
                          • Recommended
                          5 found this review helpful
                          Great for automotive suspention and maintenance work
                          I picked this subcompact right angle impact because i do a lot of my own maintenance on my vehicles. When it comes to suspension work, you often need to get into tight spaces and bust rusted bolts loose. With its compact head, long reach, and short overall depth, this right angle impact lets me get to my leaf pack shackle bolts, upper control arms, and other hard to reach fasteners without hurting myself. It is a subcompact so i have had to reach for the breaker bar on severely rusted bolts, but once it stsrts to move i switch to the impact and let it rip.
                          by
                          • Recommended
                          7 found this review helpful
                          This is a slim lithium ion battery at 2 amp hours that powers all Rigid 18V tools and interchange...
                          This is a slim lithium ion battery at 2 amp hours that powers all Rigid 18V tools and interchangeable with all 18V Rigid slide pack batteries. And with all slim slide pack batteries I get the power I need without the weight and bulk of the older batteries. This battery worked perfectly after being fully charged and powered my tool. What I like the most about Rigid is that their batteries are forward and backwards compatible. This battery seems like it lasted longer than my older Rigid battery - maybe because it was cleaner - LOL.
                          by
                          This review is from 18V 2.0 Ah Lithium-Ion Battery
                          • Recommended
                          4 found this review helpful
                          My husband and I do a lot of home improvement projects so we always have a need for quality, dura...
                          My husband and I do a lot of home improvement projects so we always have a need for quality, durable tools and accessories. We got the matching drill which doesn’t come with a battery but got this one to go along with it. We have used the 18 volt lithium ion battery a handful of times around the house and haven’t had to recharge it yet. My husband gives it two thumbs up
                          by
                          This review is from 18V 2.0 Ah Lithium-Ion Battery
                          • Recommended
                          5 found this review helpful
                          Showing 1-10 of 139 reviews

                          Compare Similar Items

                          current item

                          Power Tool Features

                          Cushioned Grip, Forward/Reverse Switch, LED Light, Lockout Power Switch, Reverse, Sub-Compact, Variable Speed

                          Cushioned Grip, LED Light, Variable Speed

                          LED Light, Sub-Compact, Variable Speed

                          LED Light, Variable Speed

                          Batteries Included

                          Yes

                          Yes

                          Yes

                          Yes

                          Battery Amp Hours

                          2 Ah

                          4 Ah

                          2 Ah

                          2 Ah

                          Torque (lb-in)

                          3000 In lbs

                          7800 In lbs

                          3000 In lbs

                          7200 In lbs

                          Battery Voltage (V)

                          18V

                          18V

                          18V

                          18V