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Internet #202263215

Model #9901

Store SKU #802418

Store SO SKU #1000682520

1/8 in. Rotary Accessory Rectangle-Shaped Tungsten Carbide for Steel, Stainless Steel, Iron, Ceramics, and Hard Wood

  • For use with Dremel rotary tools (sold separately)
  • Ideal for sharpening, deburring and grinding on hard materials
  • Designed for working with conic and flat surfaces
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Product Overview

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Established in 1932

Founded in Racine, Wisconsin Dremel continues to innovate & evolve the rotary tool.

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Dedicated to the Makers

Inspiring passionate creators through a variety of rotary tools, accessories & project inspiration.

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Simple Solutions, Endless Possibilities

Dremel’s expansive line of versatile rotary accessories empowers Doers to create, rehab, tinker, build & customize your projects

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Carving & Engraving Accessories

Ideal for carving, engraving, etching, cutting, smoothing & shaping in materials like glass, plastic & soft metals, wood, & more.

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Variety of Bit Shapes

Dremel’s line of engraving & carving accessories are made in dozens of shapes giving you the ability to achieve the ideal technique, texture, & detail for your project

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Universal Shank Size

No more hunting for the right collet. All Dremel rotary accessories feature a 1/8” standard shank.

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Genuine Dremel Quality

Rigorous testing for safety & performance is core to our DNA.

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Carving Bits

Makes shaping, hollowing, grooving, slotting & inlaying simple. Ideal for cutting through wood, plastic & soft metals.

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Engraving Bits

Best for detail engraving, carving, freehand routing in wood, fiberglass, plastic & soft metals.

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Diamond Point Wheels

For fine detail work, engraving, carving, touch-up & finishing for glass engraving, stone etching, or ceramic engraving.

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Tungsten Carbide Carving Bits

Ideal for more aggressive applications to shape, smooth, or grind hard materials like steel, cast iron, ceramics, & hard wood.

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Structured Tungsten Carbide Carving Bits

Fast-cutting sharp teeth for greater material removal. Use on fiberglass, wood, plastic, epoxy, rubber, laminates, particleboard, & ceramic tile.

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Exclusive Max Life Accessories

Provides long-lasting performance & impressive durability. Built to give Doers longer lasting, stronger performing, versatile accessories.

The Dremel 9901 is a tungsten carbide cutters are ideal for shaping, smoothing or removing material from especially hard materials. Shapes, smooth's or grinds especially hard materials including: hardened steel, stainless steel, cast iron, nonferrous metals, fired ceramics, plastics and hard woods.
  • High speed cutter made of tungsten carbide
  • Hardest material next to diamonds
  • Shapes, smoothest, removes hard material
  • Do not run in excess of 30,000 RPM
  • Screw-free design for easy locking and loading
  • A high-speed cutter made of tungsten carbide, the hardest material next to diamonds
  • Bit diameter: 1/8 in.
  • Shank diameter 1/8 in., 3.2 mm

Info & Guides

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Diameter (in.)
Product Length (in.)
3 in
Shank Size
1/8 in.


Accessory Fitment
Application Type
Number of Pieces
Rotary Tool Accessory Type
Rotary Bit
Tip Material
Carbon Steel
Tip Shape
Tools Product Type
Power Tool
Used With
Ceramic,Hard Metals,Plastic,Sheet Metal,Soft Metals,Stainless Steel,Wood

Questions & Answers

Typical questions asked about products:

  • Is the product durable?
  • Is the product easy to use?
  • What are the dimensions of the product?

Customer Reviews

  • 4.5
    out of 87 reviews
  • 90% recommend this product
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Showing 1-10 of 87 reviews
Use for instrument work
[This review was collected as part of a promotion.] An excellent tool, consistent with the Dremel name. I use mine in guitar and string bass repair work.
by Claremont Guy
    • Recommended Product
    Best on market!
    I must say, there is no competition when it comes to the tungsten carbide cutter. Hands down best on market!
    by Diligentscott
      • Recommended Product
      Carving on a Geode
      Dremel has provided me this product in exchange for an honest review. I am a newer user of Dremel carving and have been enjoying my creations while learning. After receiving this bit, I decided to try carving on stone. Something that I had seen in videos but had never tried. I had a Geode that I had picked up in Keokuk Iowa that was my medium. The bit was impressive from the first touch to the stone. I was able to clear out some of the crystals that had been damaged when the stone was broken and I was able to flatten out a portion of the top and carve the date and where it was found. I would recommend this bit to anyone serious about cutting on hard surfaces.
      by MarkH
        • Recommended Product
        Dremel has provided me this product in exchange for an honest review. I used this on one of my carving projects. It really does a great job on wood. I haven't really done any carving out of metal, but I wanted to see how it held up working with metal. I have a few pieces laying around the shop and so I just drilled some holes to see what it would do. It eats away at metal good also. I would buy this bit again.
        by Lureita
          • Recommended Product
          I am a locksmith and use these tools to "adjust" lock strikes where doors have settled or were no...
          I am a locksmith and use these tools to "adjust" lock strikes where doors have settled or were not installed properly. These tools last for years and will cut almost anything, including stainless steel. If you have a tough material to cut or anything less, this tool will do the job.
          by Jerry
          • Verified Purchase
          • Recommended Product
          Great for Ceramic cutting and drilling
          I have used this bit for making holes in my ceramic pots. Have also used it for carving designs on these pots. Great bit to have.
          by David
            • Recommended Product
            Dremel has provided me this product in exchange for an honest review. I tried this out on some bone and on some Brazilian cherry wood. It worked well on the bone. It was only fair on the Brazilian cherry; but then a lot of tools don't work well on that. With some adjustments to the speed I kept the burning of the work down.
            by lee
              • Recommended Product
              Seems genuine
              Chewed through the steel garage door rail quickly. Seemed exactly as sharp afterward. I believe this is genuine tungsten carbide. I had read some reviews on other sites from people who seemed to be getting generic, inferior products. This came sealed in Dremel packaging, but the real test was in the using it and it passed with flying colors. Glad I bought from Home Depot.
              by webgrunt
                • Recommended Product
                Works great and fast cutting. A good add to my...
                Works great and fast cutting. A good add to my collection of bits
                by GREGORY
                • Verified Purchase
                worked well on vinyl...
                worked well on vinyl
                by Mach
                • Verified Purchase
                Showing 1-10 of 87 reviews