BlackGold Drills Are Engineered For Enhanced Drilling And Long Tool Life – Ideal For Drilling Steel, Stainless Steel, And Other Tough Alloys – Black & Gold Surface Treatment Holds Lubricant For Smoother Drilling – Self-Centering 118° Split Point Prevents Drill From Walking On Work Piece – Features 3 Flatted Shank For Secure Fit In Drill Chuck – For Use In Portable Power Drill Or Drill Press – High Speed Steel