Comes in a small tough case which is compatible with the TSTAK caddy. Black Gold Drills for Metal and Multimaterial Drilling - Drills into wood, metal and plastic. No spin shank which eliminates bit slippage, provides positive lock on chuck, and ensures clean and accurate holes. Tough Core: twice as strong core for increased durability and reduced shank breakage. Optimised helix angle for reduced pull through and a 70% reduction in breakthrough torque. Features Speed Tip: optimised geometry which penetrates material faster with aggressive web design on the tip. DEWALT Black Gold HSS Drill Bits have a speed tip and a tough core for increased durability. The bits also incorporate a no spin shank that eliminates the frustration of the bit spinning in the .