Irwin - 5/16 in. X 4-1/2 in. L Cobalt Alloy Steel Drill Bit Straight Shank 1 pc

This Cobalt Alloy Steel HSS fractional straight shank jobber length drill bit features 5-1/2 Cobalt Alloy Steel for higher heat and abrasion resistance. It is heavy duty with construction for strength and durability. 135-degree point begins drilling immediately, minimizing bit walk. Irwin Cobalt Alloy Steel Drill Bit Straight Shank.