Internet #306939205

Model #TSS121

Store SKU #1003853454

Store SO SKU #1003622427

12 in. Sliding Compound Miter Saw with LED

  • Heavy Duty 15 Amp Motor with 3,800 RPM
  • Includes: 40T Carbide-Tipped Blade, Wrench, Dust Bag, and Clamp
  • Perfect for heavy duty jobs or DIY projects
  • See More Details

Frequently Bought Together


Product Overview

RYOBI introduces the 12 in. Sliding Miter Saw with LED. The heavy duty 15 Amp motor delivers up to 3,800 RPM for the power to make difficult cuts. It features a 1-1/4 in. dust port to help keep your work area clean. The 40-tooth Carbide-Tipped blade provides improved performance for fast, clean cuts and an LED Cutline Indicator for higher accuracy. Backed by the RYOBI 3-Year Manufacturer’s Warranty, the 12 in. Sliding Miter Saw with LED includes a 40-tooth Carbide Tipped Blade, table extensions, a blade wrench, a dust bag, a work clamp, and an operator’s manual.
  • California residents
  • Heavy duty 15 Amp motor to easily cut through larger material
  • Sliding head provides maximum capacity for up to 13-1/4 in. cross cut
  • LED Cutline Indicator and work-light projects cutline and illuminates material to improve accuracy of the cut and visibility
  • Extended miter range from 47° left and right to accommodate a wide variety of cuts
  • Miter stops located at the most common crown molding angles 0°, 15°, 22.5°, 31.6°, and 45° left and right for quick cut settings
  • Miter Detent Override: Quick action lever bypasses miter detent index points with one simple motion
  • Machined cast-in miter scale for accurate table alignment
  • Spindle lock for easy single wrench blade changes
  • 1-1/4 in. dust port provides connection to standard dust collection systems to help keep work area clean
  • Sliding miter fence provides support for wider material and easily adjusts for bevel cuts
  • Horizontal “D” handle for improved comfort
  • Electric brake stops the blade in seconds
  • 3-year manufacturer’s warranty
  • Includes: (1) TSS121 12 in. Sliding Miter Saw with LED, 40-tooth Carbide-Tipped blade, table extensions, blade wrench, dust bag, work clamp, and operator’s manual

  • Click here for more information on Electronic Recycling Programs

Info & Guides

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Name15 Amp 10 in. Sliding Compound Miter Saw with LED12 in. Sliding Compound Miter Saw with LED15 Amp Corded 12 in. Dual Bevel Sliding Miter Saw with 70 Deg. Miter Capacity and LED Cut Line Indicator20-Volt MAX Lithium-Ion Cordless 7-1/4 in. Miter Saw with Battery 4Ah and Charger
Save $40.00 (18%)
Save $100.00 (25%)
Miter Saw TypeSliding CompoundSliding CompoundSliding CompoundSliding Compound
Cordless/ CordedCordedCordedCordedCordless
Bevel TypeSingleSingleDualSingle
Power Tool FeaturesPositive StopsElectric Brake,Positive StopsBag Included,Electric Brake,Positive StopsKeyed Blade Change,Positive Stops
Maximum Cutting Thickness (in.)3.53.543.5
Blade Diameter (in.)1012127-1/4
Included AccessoriesAllen Key/Wrench,Blades,ClampAllen Key/Wrench,BladesBagCharger
Blade Diameter 7-1/4
Cuts Through Metal,Wood
Voltage (v) 20v
View ProductView ProductView ProductView Product



Product Depth (in.)
Product Height (in.)
Product Width (in.)
Table Length (in.)
Table Width (in.)


45 Degree Crosscut Capacity Maximum
90 Degree Crosscut Capacity Maximum - Left
90 Degree Crosscut Capacity Maximum - Right
Amperage (amps)
Arbor Size
Bench & Stationary Tool Type
Slide Miter Saw
Bevel Type
Blade Diameter (in.)
Color Family
Construction Material
Acrylonitrile Butadiene Styrene (ABS)
Cord Length (ft.)
Cordless/ Corded
Dust Collection Method
2.5 in. Dust Port
Included Accessories
Allen Key/Wrench,Blades
Maximum Cutting Thickness (in.)
Maximum Degree Miter Cuts - Left
Maximum Degree Miter Cuts - Right
Maximum Speed (rpm)
Miter Saw Type
Sliding Compound
Power Tool Features
Electric Brake,Positive Stops
Product Weight (lb.)
Tools Product Type
Power Tool

Warranty / Certifications

Manufacturer Warranty
3 limited warranty

Questions & Answers


Will this saw cut through a 6x6?

Asked by BluesGuitarStudent April 23, 2020

Hi BluesGuiatarStudent! Thank you for your question. Yes, this tool can cut through a 6x6.

Is this saw pre assembled.?

Asked by carlos September 6, 2020

Hi Carlos, Thanks for your question. This RYOBI 12 in. Sliding Miter Saw with LED TSS121 requires some assembly. - Eve

Buy a laser for it or after market laser

Asked by Marvin February 13, 2020

the video shows a laser - at 1:31 and 1:48 a RED LASER is clearly shown. maybe they changed the model. I cannot see the shadow of the blade outside so it is useless. the red laser on my other Ryobi tools shows clearly outside. disappointing for sure

The lower guard assembly broke. Where would i order a new one?

Asked by JJ October 17, 2020

Ryobi has a great customer service and they get on everything in a hurry except if you want to return a battery for warranty, they suck at that.877-655-5250

how wide of a board could be cut?

Asked by HomeDepotCustomer April 25, 2020

Hi HomeDepotCustomer! Thank you for your question. With a 0 degree miter and bevel, a maximum nominal lumber size would be 2 x 14. Additional cutting specs can be found in the saws manual.

Will this cut 2x16 at 90 degrees?

Asked by Ryan April 19, 2020

Thank you Ryan for your inquiry. The RYOBI TSS121 is designed to work with a 0' to 45' with array of cut capacities, please seek complete details within owner's manual. ~Best Regards, Ashley

how do you activate the red laser shown in video? at 1:31 and 1:48 a RED LASER is clearly shown....

Asked by thehman June 7, 2020

Hello Thehman, Thanks for your question on the RYOBI TSS121 12 in. Sliding Miter Saw with LED. This saw is equipped with a white LED and not a Laser that produces the red notification mark. I hope this helps. - Eve

In the description it states a 24 tooth blade is included but in the photos it shows a 40 tooth b...

Asked by BigD January 2, 2020

Mine came with a 12” 40 tooth blade... it’s a decent blade but I will be changing soon to minimize the tear outs

Where can i get a replacement safety guard? Mine slid back into the blade on my first cut and broke the plastic

Asked by Tim November 26, 2020

Hi Tim, Thanks for choosing the RYOBI 12 in. Sliding Miter Saw with LED TSS121. The safety guard can be obtained by calling Home Depot at 1-800-466-3337 for a special-order assistance, by visiting or by contacting Gardner at 1-877-634-5704. Thanks for asking! - Eve

Hello just need to verify, can this saw cut a 6x6 post?

Asked by Daniel May 27, 2020

Hi Daniel! Thank you for your question. This saw would not be well accommodating to a post of that size.

12 in. Sliding Compound Miter Saw with LED - page 2

Customer Reviews

  • 389 Customer Reviews
  • 4.6 out of 5 stars overall
83% of customers recommended.
Overall Ratings
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Works extremely well and so easy to use. My husband...
Works extremely well and so easy to use. My husband did a new project over the youth sports pause in MN to keep us busy. The saw was put to great use and well worth it.
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Bad boy
This mitre saw is Michael Jackson bad! I absolutely love it. I had been looking at it for a while and decided to go ahead and purchase it. Powerful and accurate... I cannot wait to use it for more upcoming projects
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check this immediately after purchase
I bought this saw to replace a compound mitre saw I'd had for years to cut trim and molding, but it wouldn't cut anything bigger than a 2x4. This saw is great, powerful and has a long enough slide to cut 2x12s and tall enough to cut 4x4s or 4x6s. I've had it now for 2 years and didn't realize till recently that it had a problem that wasn't the operator. The fence, a one piece cast and machined aluminum that's not adjustable, is not straight. With a straight edge all the way across the table touching the ends of the fence, there is a .090" gap behind the work at the point the blade cuts. This is OK for cutting long lumber or framing but if I'm only trimming an end where the work is just contacting one side of the fence, all cuts are crooked. Using the compound mitre for trim is impossible. Other than this issue, this is a great saw and I still recommend it, but check for this issue right away. By the time I realized it wasn't the operator, it was too late to return it. G Cowan Stockbridge Ga
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It says it is compatible with up to 12" saws....
It says it is compatible with up to 12" saws. It doesnt say that you need to mount the saw to 1/2" plywood prior to it fitting on the sliders. it doesnt tell you what fimensions to cut the plywood or length for the 5/16th hex bolts to use to affix the saw. If you update the manual to give people more guidance on the mounting board it would be 5 stars.
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Bought to cut 5 1/4 inch baseboard. It won't cut
I bought the saw today because my 10 inch saw couldn't cut my 5 and 1/4 inch baseboard. Well to my surprise this saw cannot cut 5 1/4 inch baseboard for inside and outside cuts ether. I'm extremely disappointed will be returning the saw for one that will. I knew the 269 price was too good to be true. If you don't have anything over 5 inches it might be good for you.
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So far so good - cannot find the red laser feature
the video shows a red guide laser, i cannot find the activation to turn it on. this should be an auto on feature so i will have to lower the star rating. that was a big feature i was looking for. the led light is not good and is useless outside.
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Great saw
Love this saw, was considering a small blade but decided against it because I would rather have too much than too little. Box is big but the saw is huge. Easy to use, accurate cuts. Dust bag is...not great it catches the saw dust but a lot gets left on the floor but I can work on that. Shadow line is great no need to calibrate. Did buy a higher tooth blade but for now the stock blade works great. Very happy. Can't wait for more home projects.
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Great miter saw
Before i get in the pros and cons of this miter saw, I'm first going to say, out of the box, there is nothing this saw can't tackle. The 12 in blade is big enough for pretty much any project you're trying to accomplish. This miter saw does not come with a laser which is a plus. There is a switch by the handle to turn on the LED light. light light shines on the object you are trying to cut which makes a straight ACCURATE line. A lot more accurate than any laser. i checked this miter to see if it was out of square, everything seem to match up. PROS 1.POWERFUL miter (cuts like butter) 2. Everything is square out of box. No adjustment needed for miter cuts 3.LED rather than laser. Please refer to pic to see what it looks like CONS 1. The biggest con of this saw is the bag. The bag is pretty useless. You can see the hole thats suppose to suck up the dust towards the middle of the saw. i felt it was not sucking it up good enough compared to other saws. It appeared to create more saw dust than normal. 2. Not really a con but this saw is heavy. Just tells me it is built well
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I love this saw!!!
I love this saw!!!
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Great product for the price. I have used this on several projects so far, and it is operating well.
Great product for the price. I have used this on several projects so far, and it is operating well.
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