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HSS Cobalt drill bit jobber length twist drill bit, fully ground M35 Co5% High Speed Steel. Drill stainless steel, metal, iron, plastic, copper, aluminium with 135° split point tip. Cobalt alloy for up to 15x life vs. black oxide drill bits QUADEDGE TIP designed to decrease heat build up and drill faster ENHANCED TAPERED WEB strengthens the bits core VARIABLE HELIX Design for rapid material extraction 135° split point for precision start no walking Drill Bit Set is engineered for extreme durability and longer life in hard metal applications. The Cobalt drill bits are designed with a VARIABLE HELIX that includes an aggressive 35° Helix Angle which ends at 15°. The drill bits have QUADEDGE TIP to decrease heat buildup and drill faster.
When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.