Cobalt Drill Bit Set for Metal and Hardened Steel, 29Pcs M35 HSS Twist Jobber Metal Drill Bits 1/16"-1/2", with Index Storage Case
Cobalt Drill Bit Set for Metal and Hardened Steel, 29Pcs M35 HSS Twist Jobber Metal Drill Bits 1/16"-1/2", with Index Storage Case
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Sinyeenglon

Cobalt Drill Bit Set for Metal and Hardened Steel, 29Pcs M35 HSS Twist Jobber Metal Drill Bits 1/16"-1/2", with Index Storage Case

Cobalt Drill Bit Set for Metal and Hardened Steel, 29Pcs M35 HSS Twist Jobber Metal Drill Bits 1/16"-1/2", with Index Storage Case29 piece cobalt drill bit set M35 high speed steel torsion drill bit suitable for hardened metal99 piece cobalt drill bit set M35 high speed steel torsion drill bit suitable for hardened metal21 piece cobalt drill bit set M35 high speed steel torsion drill bit suitable for hardened metal9 16 Cobalt Drill Bit for Metal and Hardened Steel 1 2 Inch Reduced Shank M35 HSS Twist Heavy Duty Drill Bits with Index Storage Case5 8 Cobalt Drill Bit for Metal and Hardened Steel 1 2 Inch Reduced Shank M35 HSS Twist Heavy Duty Drill Bit with Index Storage Case13 piece cobalt drill bit set M35 high speed steel torsion drill bit suitable for hardened metal
Model:29PCS(1/16-1/2)

Key item features

  • Premium M35 Material: Constructed from M35 Cobalt HSS, offering superior hardness up to 67 and a lifespan up to 12 times longer than average HSS titanium-coated bits.
  • Enhanced Durability Design: Features a hardened full grinding process for increased wear resistance, a precise 135-degree split point, and a gold oxide finish to prevent walking and clear chips efficiently.
  • Versatile Drilling Applications: Ideal for cutting through hard metals like stainless steel, cast iron, and titanium alloy, as well as softer materials, but not suitable for glass or ceramic.
  • Comprehensive Size Range: Includes 29 drill bits ranging from 1/16" to 1/2", providing a wide selection for various drilling needs.
  • Optimal Usage Guidelines: Recommends vertical drilling, low speeds (200-1000 rpm), and the use of cutting fluid to maintain bit longevity and performance.
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Arrives by Sat, Jun 27
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Fulfilled by Walmart
5 stars out of 5, based on 1 seller review(5.0)
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4.6 out of 5 stars
stars42 ratings9 reviews
How item rating is calculated
  1. 5 stars81% (34)
  2. 4 stars5% (2)
  3. 3 stars12% (5)
  4. 2 stars0% (0)
  5. 1 star2% (1)
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Showing 1-3 of 9 reviews

Jun 2, 2026
George
Item details
Model: 99PCS(1/16-3/8)
5 out of 5 stars review

Verified Purchase

Strong material. Drills clean.

Review for: Sinyeenglon Cobalt Drill Bit Set for Hardened Metal and Stainless Steel, 99Pcs M35 HSS Twist Jobber Metal Drill Bits 1/16"-3/8". Arrived quickly in excellent condition exactly as described at a nice price. Storage carton is heavy plastic with actual mechanical hinges and a metal clasp closure. The case has compartments with clearly marked sizes. I've only used these a couple of times so far. But they seems to be high quality. First thing I did was drill 12 holes in steel washers for a project I'm doing. Using one of the 7/32" bits from this set I drilled all 12 holes in 1/8" thick steel and the bit seems still sharp enough to do some more. (Of course, I use oil to keep the bit point lubed during the drilling operation.) I also drilled a few holes in plaster walls to insert screw anchors. No problems so far. Clean cuts. Works fast. I'm satisfied these are a good value.

Helpful?5765PTASAS7M17380454387
May 28, 2026
anonymous
Top Reviewer
Item details
Model: 13PCS(1/16-1/4)
5 out of 5 stars review

Verified Purchase

this is a gift for a young man whose birthday is in September so writing of review ahead of time kind of bothers me but I'm hoping the quality is amazing and as great as the shipping was

Helpful?5765PTASAS7M17380454387
Jan 21, 2026
Alfred
Item details
Model: 21PCS(1/16-3/8)
5 out of 5 stars review

Verified Purchase

i like having this set on hand for the value and ease of finding the right size bit for my projects. the quality of walmarts bits are exceptional maternal

Incentivized Review
Helpful?5765PTASAS7M17380454387