About This

Various Sizes: 29pcs Including 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".
Premium Black and Gold: Made from high-speed steel with a black and gold oxide coating, these drill bits offer excellent corrosion and wear resistance, making them ideal for drilling through tough materials like stainless steel, cast iron, and hardened steel.
Quick and Efficient: The cobalt drill bit set can be used effectively on most soft and hard objects, with a 135-degree point tip and twist design for faster cutting, self-centering to prevent walk-off, and faster chip and particle removal.
HSS Drill Bit Set: HSS cobalt drill bit set for hardened steel with excellent cutting performance. Drill bits for long-term use. The inserts are hardened and polished for improved sharpness and precise cutting without wobbling.
Provide long-term after-sales service: If you are unsatisfied with our product, we offer a 100% refund or replacement.