Luckyway Cobalt Drill Bit Set 21 PCS 1/16"-1/2" with Bullet Point Tip and Countersink Drill Bit 4 PCS 1/4"-5/8", TiAlN Coated for Hardened Metal, Mild Steel, Stainless Steel

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• 【21-Piece Cobalt Drill Bit Set Pro】- Includes metal drill bits: 1/16"(*2), 5/64"(*2), 3/32"(*2), 7/64"(*2), 1/8"(*2), 9/64", 5/32", 11/64", 3/16", 13/64", 7/32", 15/64", 1/4", 5/16", 3/8", 1/2"; 1pc 2 Inch PH2 Screwdriver Bit for free
• 【4-Piece Cobalt Countersink Drill Bits Set Pro】- Includes 1/4", 3/8", 1/2", 5/8"; Meets all requirements of the matching drill bit
• 【All Made 5% Cobalt M35 HSS】-Engineered for stainless steel, alloy steel, and other hard metals. Designed specifically for hard materials
• 【Titanium Aluminum Nitride Coating】 - Increases surface hardness to 94HRC with outstanding heat-resistance, so your drill bit cuts fast and stay sharp
• 【Specifically Crafted Bullet Point】 - Sharp and self-centering tip minimize wandering and provides precise and accurate drilling. Compared with the ordinary drill, this kind of drill is easier to use for metal drilling
• 【3-Flute spiral groove Design for Smooth Cuts】- Countersink drill bits with 3-Flute spiral groove geometry reduces vibration, distributes cutting forces evenly, and ensures stable, smooth cuts with minimal burrs—perfect for counter sink bit for hard metal.
• 【Universal Shank Design】- 3-flats shank for metal drill bit to reduce spin-out in the chuck; 1/4" hex shank for countersink drill bit fits drills and electric screwdrivers securely.
• 【90 Days Warranty】 - In the event that you are not completely satisfied with your purchase for any reason, please reach out to us, and we will gladly provide a 105% refund or replacement.