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Internet # 100660650

Model # DR04108

Store SKU # 625238

Store SO SKU # 315129

1/4 in. x 1 in. Carbide Straight Router Bit

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  • Use in CNC, hand-held and table-mounted routers
  • Cuts all composition materials, plywood, hardwood & softwood
  • TiCo Hi-Density Carbide for flawless finishes and longer life
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Product Details

Ideal for general stock removal, the Diablo 1/4 in. x 1 in. Carbide Straight Router Bit has a kickback-reducing design that fosters smooth, balanced operation for controlled, safe cuts. It's constructed with solid carbide to withstand high temperatures and features a non-stick coating to reduce friction. Impact resistance comes courtesy of tri-metal brazing, keeping vibrations to a minimum for superb maneuverability.
  • Provides a safe, controlled cut ideal for general stock removal
  • Tri-metal brazing provides an impact-resistant bond between the carbide and bit
  • Solid carbide is corrosion-resistant and stands up to heavy-duty use
  • Requires a minimum chuck size of 1/4 in.
  • Overall diameter = 1/4 in.
  • Carbide height = 1 in.
  • Shank diameter = 1/4 in.
  • Overall length = 2-1/2 in.
  • Return Policy


Dimensions: H 1.5 in, W 1.5 in, D 4.8 in


Cut Radius (in.).25 inProduct Depth (in.)4.8 in
Product Height (in.)1.5 inProduct Length (in.)2.5 in
Product Width (in.)1.5 inShank Diameter (inch)1/4 inch


Individual/SetIndividualNumber of Flutes2
Number of Pieces1Returnable90-Day
Router/planer typeStraightSelf-FeedingNo
Tools Product TypePower Tool

Questions & Answers

Q:what feeds and speeds for a cnc? linear feedrate and rpm?
by|Mar 21, 2023
0 Answer
Answer This Question
Q:Is this a 1/2inch shank
by|Feb 20, 2021
2 Answers
Answer This Question

A:  Hi Tom, the DR04132 has a ¼” shank.

by|Oct 14, 2021

    A:  This bit has 1/4" shank. You can scroll down on the Home Depot website to see the specifications of the bit.

    by|Feb 21, 2021
    Q:Can I plunge with this bit?
    by|Mar 7, 2020
    3 Answers
    Answer This Question

    A:  I did and it worked well

    by|Mar 6, 2023

    A:  Yes, when i'm cutting blind plate edge or hidden dado. Take your time and go in small increments. I use about 1/8 max at a time.

    by|Mar 4, 2023

      A:  Hi Springer! Yes, this bit can be used to plunge, but it is best to advance the router slightly while plunging, rather than boring directly down at 90 degrees.

      by|Oct 20, 2021
        Q:Is this true 1/4" or undersize for plywood?
        by|Sep 24, 2019
        5 Answers
        Answer This Question

        A:  They are a true 1/4 inch.

        by|Nov 5, 2019

          A:  So I've noticed that my cnc cuts weren't always coming out to scale. I put my calipers on these bits, and found them to be smaller than the advertised size (on the cutting end). Where 1/4" is 6.35mm, I've had to set my CAM to 6.30mm tool diameter and that solved alot of issues. Just be sure to put calipers on each tool, because the diameters are all different, even on the same bit. One was even as small as 6.25mm. Hope that helps.

          by|Aug 6, 2020
            1 found this answer helpful

            A:  Sir your question is a little unclear to me - in terms of context in this regard. On the one hand if the label on the router bit states it’s got a 1/4” cutter diameter - then that’s the diameter you may count on: 0.25 inches (or diameter of 6.35 mm) +/- a.very small tolerance of about 0.005” ( ~ a gage-makers tolerance +/- 0.013 mm) that’s ~1” long (effective cutter length) Since this was cut from a round carbide shaft that also has to fit into the 1/4” inside diameter collet on the router the cutter-shaft will also be very close to that 0.25 inch diameter size. On the other hand - if you’re planning to use this bit to cut a groove for 1/4” plywood -,you’ll perhaps not be completely satisfied with this size because while the edge of the “1/4 plywood” will fit in this size of groove; it will be roomy fit even if you use yellow (aliphatic) glue to fix it (the 1/4” ply) in the groove. Plywood of this thicknesses may be up to 1/16” thinner than the posted 1/4” expected thickness since that’s what the “mill standard” allows. Hope this helps. Grumpy Joe.

            by|Feb 20, 2023
            1 found this answer helpful

            A:  Hi Doug, the DR04108 is a true ¼” diameter bit.

            by|Sep 28, 2021

              A:  I would think not but it depends on how thick your plywood is and the RPM of your router.

              by|Apr 21, 2021
                Showing 1-4 of 7

                Customer Reviews

                4.3 out of 5
                • 4.3
                  out of 247 reviews
                • 81% recommend this product
                Filter by:
                Showing 1-10 of 247 reviews
                Broke after a few minutes of use
                Purchased this bit yesterday and used it to cut a 3/4" deep circular notch into plywood with my handheld router. The bit cut well, but after ~ 6 inches of cutting, it broke where the shank of the bit meets the router collet. Extremely disappointed.
                Response from DiabloProductExpertMay 9, 2022
                We're genuinely sorry to see you've had such a challenging experience Ben. We take our customers’ feedback quite seriously and will be passing this on to the team for review. Please know we stand behind the quality of our products and want to make this situation right. Please contact us at your earliest convenience: https://www.diablotools.com/contact
                  Couple uses and one of the teeth come off
                  Couple uses and one of the teeth come off
                  Response from DiabloProductExpertJun 28, 2021
                  Thank you for posting! We're sorry you've had such a challenging experience thus far. Please know that we stand behind the quality of our products and we're here to help. We hope you'll give us a call and an opportunity to make this right: call 800-334-4107 or email customerservice@diablotools.com. We look forward to speaking with you!
                  • Verified Purchase
                  It looks very nice
                  I bought this to start on a new project. I had a straight cut bit already for the router, but I thought, this project should start with fresh items to give the best finish possible. The bit fit my router. On the first plunge cut went smooth. As I move the router to cut the path the tips of the bit shattered. One minute into the project and I had to switch back to the older bit. From what I guess, the bit hit a knot. I would have expected this product to last longer than a minute. I expected it to be used to finish the project. This did not meet my expectations for the product.
                  Response from DiabloProductExpertApr 6, 2021
                  Thank you for the thoughtful input. Please know that we take our customers’ feedback seriously and will be sharing this with the team for review. In the meantime, we’d love to further discuss your experience. When you have a moment, give us a call at 800-334-4107 or email customerservice@diablotools.com.
                    Nice clean cuts in pine and poplar. I needed something for my router table to clean edges on 1x ...
                    Nice clean cuts in pine and poplar. I needed something for my router table to clean edges on 1x for joining. I also use it in my handheld for plate edges on shelves. I follow up with 45° bevel on one side and it works perfect.
                    • Verified Purchase
                    • Recommended
                    1 found this review helpful
                    Used to dato 3/4 cherry. Chucked it up in my shaper. Made 3 passes for the required 3/8 inch dep...
                    Used to dato 3/4 cherry. Chucked it up in my shaper. Made 3 passes for the required 3/8 inch depth just to be safe. Very smooth cuts. I only gave it 4 stars because I really wanted a 1/2 inch shank which wasn't available at my local Home Depot.
                    • DIY
                    • Verified Purchase
                    • Recommended
                    Sharp, Accurate, Perfect for Dados and Rabbets.
                    I wanted to build a shadow box bookcase for my son and his fiancé as a housewarming present. I bought this bit with the express purpose of making dados and rabbets. I built a jig specifically for it and was very pleased with the results.
                    • DIY
                    • Verified Purchase
                    • Recommended
                    1 found this review helpful
                    They're strong and keep a nice sharp edge.
                      Just as good as the other router bit manufacturers
                        Router bit , The router bit worked nicely for my project.
                        • Verified Purchase
                        Just a router bit. Not much more to say about it
                        • Verified Purchase
                        Showing 1-10 of 247 reviews