M35 Cobalt Drill Bit Set for Hardened Metal & Stainless Steel - 21pcs Titanium Aluminum Nitride Coated (TiAlN), Three-Flute Design, 1/16"-1/2" Metal Drill Bits

Engineered for Hardened Metals with
M35 Cobalt Steel: Made from premium M35 cobalt high-speed steel (5% cobalt), these bits are specifically designed to handle tough materials, including stainless steel, hardened cast iron, high-carbon steel, and titanium alloys, with effective drilling hardness up to 60 HRC. TiAlN Coating for
Exceptional Heat Resistance: The Titanium Aluminum Nitride (TiAlN) nano-coating withstands cutting temperatures up to 1472°F (800°C), greatly reducing heat buildup and friction, leading to a notably longer operational period compared to standard titanium nitride or oxide coatings.
Triple-Flute Design: Smoother Finish, Faster Drilling, Pinpoint
Accuracy: The innovative three-flute shape delivers three key benefits over conventional two-flute bits: superior hole roundness and wall finish, approximately 40% improved chip ejection for cooler operation, and enhanced drilling accuracy with reduced bit walk. For best results, recommended for standard depth of cut applications. Three-Flat Shank for
Maximum Grip & Zero Slip: The precision-machined three-flat shank ensures a secure lock in the drill chuck, preventing spin-out even under high-torque conditions from impact drivers and heavy-duty drills. This shank design is compatible with a wide range of standard drill chucks, including those on impact drivers and heavy-duty drills.
Comprehensive 21-Piece Professional Set: This ready-to-use set contains 21 essential sizes from fine 1/16" to heavy-duty 1/2", addressing over 90% of common metal drilling tasks.
*Note: Bits 1/16" through 7/64" feature a precise two-flute design for delicate work, while sizes 3/32" and up utilize the performance triple-flute design. *