#9 Multi-Hole Step Bit, 3/16" - 1-1/8" , High Speed SteelCuts mild steel, aluminum, brass, copper, wood, fibreglass, plastics and laminates Durable split point tip for fast, accurate material penetration Patented split step design optimizes chip load for fast, smooth cutting, and more holes per charge Progressive cutting edges provide balanced aggression to maximize torque efficiency and minimize stalling Improved double flute design for superior chip evacuation, cutting speeds and tool life Three flat