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GMTOOLS

GMTOOLS 29Pcs Cobalt Drill Bits Set, M35 High Speed Steel, 135 Degree Tip, Stainless Steel, Plastic and Wood with Metal Indexed Storage Case 1/16"-1/2"

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Availability: 12 left in stock
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Arrives Sep 3 – Sep 7
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Style: 29 pcs Cobalt


Features

  • Perfect Drill Bits: Precision grinding process for a clean surface and high grinding accuracy. Universal round drill shank, widely applicable of tool holding systems and tightly clamped
  • 135 Split Point & Twist Design: The 135 degree fast cutting point is automatically centered and penetrates quickly with less pressure, reducing walking, fully ground drill bit with sharp and durable cutting edge. Twist design for clear chips faster
  • Enhanced M35 Alloy Material: These drill bits contain 5% Cobalt alloy steel, which increases wear resistance and durability. Industry grade high speed steel drill bit set, harder than 4241 HSS used in other similar drill bits set
  • Set Includes: 1/16, 5/64, 3/32, 7/64, 1/8, 9/64, 5/32, 11/64, 3/16, 13/64, 7/32, 15/64, 1/4, 17/64, 9/32, 19/64, 5/16, 21/64, 11/32, 23/64, 3/8, 25/64, 13/32, 27/64, 7/16, 29/64, 15/32, 31/64 and 1/2 inch bits; Comes in metal indexed storage case for easy storage
  • QUALITY COMMITMENT: If for any reason you are not satisfied with your purchase, please contact us. We provide 30-day money back. 100% Satisfaction Guarantee for risk-free shopping!

Features

  • Perfect Drill Bits: Precision grinding process for a clean surface and high grinding accuracy. Universal round drill shank, widely applicable of tool holding systems and tightly clamped
  • 135 Split Point & Twist Design: The 135 degree fast cutting point is automatically centered and penetrates quickly with less pressure, reducing walking, fully ground drill bit with sharp and durable cutting edge. Twist design for clear chips faster
  • Enhanced M35 Alloy Material: These drill bits contain 5% Cobalt alloy steel, which increases wear resistance and durability. Industry grade 6542 high speed steel drill bit set, harder than 4241 HSS used in other similar drill bits set
  • Set Includes: 1/16, 5/64, 3/32, 7/64, 1/8, 9/64, 5/32, 11/64, 3/16, 13/64, 7/32, 15/64, 1/4, 17/64, 9/32, 19/64, 5/16, 21/64, 11/32, 23/64, 3/8, 25/64, 13/32, 27/64, 7/16, 29/64, 15/32, 31/64 and 1/2 inch bits; Comes in metal indexed storage case for easy storage
  • QUALITY COMMITMENT: If for any reason you are not satisfied with your purchase, please contact us. We provide 30-day money back. 100% Satisfaction Guarantee for risk-free shopping!

Material: Cobalt Steel


Finish Type: Titanium


Shank Type: Straight


Cutting Angle String: 135 Degrees Degrees


Brand: GMTOOLS


Package Dimensions ‏ : ‎ 7.76 x 4.72 x 2.32 inches; 3.24 Pounds


Item model number ‏ : ‎ Cobalt Twist Drill Bit


Date First Available ‏ : ‎ July 5, 2022


Manufacturer ‏ : ‎ GMTOOLS


Best Sellers Rank: #4,340 in Tools & Home Improvement (See Top 100 in Tools & Home Improvement) #11 in Jobber Drill Bits


#11 in Jobber Drill Bits:


Customer Reviews: 4.4 4.4 out of 5 stars 940 ratings


Material: Cobalt Steel


Cutting Diameter: 0.13 Inches


Finish Type: Titanium


Shank Type: Straight


Cutting Angle String: 135 Degrees Degrees


Brand Name: GMTOOLS


Model: Cobalt Twist Drill Bit


Set Name: 29Pcs Cobalt Drill Bits Set


Unit Count: 1 Count


Manufacturer: GMTOOLS


Part Number: Cobalt Twist Drill Bit


Number of Pieces: 29


Included Components: 1


Cutting Diameter: 0.13 Inches


Minimum Bore Diameter: 0.06 Inches


Material Type: Cobalt Steel


Finish Types: Titanium


Shank Type: Straight


Surface Recommendation: Metal


Cutting Angle String: 135 Degrees Degrees


Tool Flute Type: Spiral


Point Style: Split Point


Number of Flutes: 2


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Sep 3 – Sep 7

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Similar Products

Top Amazon Reviews

    • Has a very good bite when drilling
Style: 15 pcs Cobalt
Seem very good, drilled thru light steel like butter.
Reviewed in the United States on June 9, 2026 by Thomas Locke
    • Good buy.
Style: 15 pcs Cobalt
Work great.
Reviewed in the United States on March 31, 2026 by Dave
    • Great Drill Bit Set for the Garage and DIY Projects
I picked up this cobalt drill bit set because I was tired of constantly hunting for the right size bit or replacing cheap bits that dulled too quickly. After using this set on several projects, I'm very happy with the purchase. The metal storage case keeps everything organized and makes it easy to find the size I need. I've used the bits on steel, aluminum, plastic, and wood, and they've performed well across the board. The bits cut cleanly and seem to hold their edge much better than some of the basic sets I've owned in the past. I recently used them while working on a vehicle project that required drilling through thicker metal, and they handled the job without any issues. The 135-degree split point helps the bit start accurately and reduces wandering, which is always appreciated. Having such a wide range of sizes in one kit has been extremely convenient. The quality feels good, the case is sturdy, and the set offers excellent value for the money. It's become one of those tool sets I find myself reaching for all the time. ... show more
Reviewed in the United States on June 1, 2026 by Sean S
    • Good bits, poor quality box.
Bit’s are sharp and appear to hold an edge; I have only used two Bits out of the index and both worked well. Index box is thin and deforms easily, latch is not trustworthy. Good bits, poor quality box.
Reviewed in the United States on June 2, 2025 by Amazon Customer
    • Butter cutter
Style: 15 pcs Cobalt
Works like a champ. Cuts metal like butter!!
Reviewed in the United States on April 6, 2026 by Martyson
    • Pretty solid an durable Pretty solid an durable
Style: 29 pcs Black Gold
Review Image by Me
Review Image by Me
Well i broke one bit, but for the money they're pretty solid considering im going through cold rolled steel thats a 1/4" thick. Also, if youre going through any solid metal such as steel, dip the bits in oil at the tip to help with the heat
Reviewed in the United States on March 22, 2026 Reviewed in the United States on March 22, 2026 by Me
    • Good buy for when you need many types of drill bits!
I have purchased several of these for projects and work. The quality of the cobalt alloy bits is good for the price, and the selection of sizes has no gaps as far as I can tell and are well labeled inside the case.
Reviewed in the United States on May 26, 2026 by Ed
    • Not for hard metal
Style: 13 pcs Cobalt
Fairy good
Reviewed in the United States on April 11, 2026 by Gary Davenport

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