Steel Vision Tools 14 Piece Stepped Tip Drill Bit Set More Life as compared to split point drill bitsNO Surface Walking!Multi-stepped points cut on impact without the need for making a starter holeTri-Flatted shanks improve chuck grip by “exacting” the grip fitTungsten-Cobalt hi-moly alloySizes 1/8″ to 1/2″ by 32nds