Milwaukee 8 Piece HSS-Cobalt Metal Drill Bit Set Inc. Case - 4932499256When you need to drill through hard metals that produce significant amounts of heat at high speeds, nothing will do a more efficient job than a Milwaukee High Speed Steel Cobalt Metal Drill Bit. Made from a 5% cobalt alloy, these high performance bits are extremely heat resistant and durable, with quad edge tips that allow for much more precise centring (and a 135 split point to reduce "walking"). Extremely versatile, these bits are capable of