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Internet # 202327761

Model # 49-56-9645

Store SKU # 231194

4 in. Hole Dozer Bi-Metal Hole Saw

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  • Most Durable Hole Saw. Period.
  • New 3.5 TPI Tooth Design
  • All- Access Slots for Fast Plug Removal
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Product Details

About This Product

Use the Milwaukee 4 in. Bi-Metal Hole Saw to cut holes in a variety of materials. The steel hole saw can drill almost 2 in. D. Milwaukee Ice Hardened products utilize a proprietary cryogenic hardening process that improves upon traditional heat treat processes. Unlike surface coatings that wear away, cryogenics harden to the core by minimizing soft metal (austenite) and creating more hard metal (Marten site). The result is a product that is more consistently hard throughout, resulting in life up to 50% longer than the competition.


Product Information

Internet # 202327761

Model # 49-56-9645

Store SKU # 231194

Additional Resources

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From the Manufacturer



Bit Diameter

4 in

Bit Length (in.)

1.625 in

Drilling Depth (in)


Hole Saw Diameter (in)



Arbor included


Arbor Size


Bit Material


Drill Bit Type

Hole Saw

Drill Bit Type(s) Included

Hole Saw



Material Cut


Min Chuck Size Required

1/2 In.

Pilot Bit Included




Shank Style


Teeth Per Inch


Tools Product Type

Power Tool

Questions & Answers

Q:Will this cut thru plate steel like 1/8” thick diamond plate? I need to drill holes in a flatbed for tail lights
by|Apr 3, 2024
1 Answer
Answer This Question

A:  Hi James! The 4-1/2 in. Hole Dozer Bi-Metal Hole Saw is for use in metal, aluminum, plaster, drywall, wood, and wood & nails. - Milwaukee Tool Social Team

by|Apr 4, 2024
    Q:Can I use this bit to cut through glass block?
    by|Oct 6, 2023
    1 Answer
    Answer This Question

    A:  Hi Danny - the Hole Saw, is not intended to go through glass. We recommend our DIAMOND MAX™ Diamond Grit Hole Saw 3 PC Set. - Milwaukee Tool, Social Team

    by|Jan 10, 2024
      Q:What is the diameter of the plug on a 3 1/8 and a 3 1/4 hole saw
      by|Sep 19, 2023
      1 Answer
      Answer This Question

      A:  Hi there - The hole saw takes a 7/16" shank. - Milwaukee Tool, Social Team

      by|Dec 11, 2023
        1 found this answer helpful
        Q:Can I use the 3-3/8" dia. to cut outlet holes in my .032" thick aluminum gutters without creating ragged edges?
        by|Sep 15, 2023
        1 Answer
        Answer This Question

        A:  Hi Bucky! The HOLE DOZER™ with Carbide Teeth Hole Saws is for 1-5/8" Cutting Depth. - Milwaukee Tool, Social Team

        by|Sep 18, 2023
          Showing 1-4 of 170

          Customer Reviews

          4.4 out of 5

          • 4.4 out of 4,105 reviews
          • 86% recommend this product
          Filter by:
          Showing 1-10 of 4,105 reviews
          Bought this to cut holes for recessed lights on a plaster with wood strip ceiling without wire mesh. After 2 holes, the blade was already dull!
          Response from Milwaukee ToolFeb 11, 2024
          Hello, thank you for providing feedback on your hole saw. Can you please send us an email at social.media@milwaukeetool.com, so we can gain more information about your experience? Thank you - Milwaukee Tool Social Team
            Very durable, long lasting hole saw. I have owned many sizes of this brand over the years. No need to look any further. The price is great for the excellent quality.
            • Verified Purchase
            one hole is all you get.
            I bought this hole saw to cut a hole in a piece of 1/4" mild steel. Milwaukee says it works on "thin/think metals" and the packaging showed a hole in an ibeam so i figured it would handle the task. i was able to (barely) get one hole done and it barely removed the paint on the second piece.
            Response from Social TeamJan 17, 2024
            Thank you for taking the time to leave a review on your HOLE DOZER™ Hole Saw Bi-Metal. We recommend our HOLE DOZER™ with Carbide Teeth Hole Saws. These carbide teeth hole saws provide the longest life in general purpose and extreme materials with the ability to cut through stainless steel, cast iron, fastener-embedded wood, cement board, fiberglass, plaster, asphalt shingles, and more with ease. - The Social Team
              6” hole saw junk!
              Cut 1 hole in drywall and the teeth have already rounded off. Wouldn’t even start the second hole. This bit is junk.
              Response from Milwaukee ToolJan 2, 2024
              Maxb, thank you for taking the time to review your Hole Dozer Bi-Metal Hole Saw and we are sorry to hear about the unit dulling teeth after one hole. We would like to get you connected to our product management team. Could you send our team an email at Social.media@milwaukeetool.com? Thank you - Milwaukee Tool, Social Team
                The only bits we buy!
                Great when drilling out new locksets. Deep depth and a fast quick connect.
                  • Recommended
                  I always use the best Milwaukee products
                  I love these saw blades. Cuts through wood so fast and are easy to use and hook up.
                    • Recommended
                    I will buy again.
                    Works great easy clean out and I use daily I like the Dozer better than my other go to because they hold up longer. Next up will be the pa kout set with the case I like easy.
                      • Recommended
                      Heavy Duty and cuts smoothly
                      I use the hole saw to cut holes into the firewall on custom cars and trucks. Works great! And they last allot longer.
                        • Recommended
                        I would recommend this product
                        I am a plumber who needs holes fast, time is money. Product came fast, Looked great, and preformed even better. I put the dozer to work right away on some 10 gauge sheet metal and it made quick work of it. Love them!!
                          • Recommended
                          I would purchase again
                          These are great. Of course Milwaukee products always are. They cut through fast and clean.
                            • Recommended
                            Showing 1-10 of 4,105 reviews