Multi-Hole Step Drill Bit, 3/16 in dia Min Hole, 1/8 in dia Max Hole, 4 Steps, Mild Steel

Master your jobs with speed and accuracy with Greenlee GSB12 1-3/8 in step bit #12, catalog GSB12. This power tool accessory offers the fastest and smoothest cutting with significantly more holes per charge by optimizing chip load with the patented split-step design. This multi-hole step bit has a durable split-point tip for speedy and accurate material penetration that cuts up to 10 ga mild steel, aluminum, brass, copper, wood, fiberglass, plastics, and laminates. It features progressive cutting edges that provide a balanced aggression to maximize torque efficiency and significantly minimize stalling, and its three-flat shank works for all 1/2 in drill chucks. The improved double flute design delivers a superior chip evacuation and impressive cutting speeds, and the step bit's high-speed steel construction provides durability for a long tool life. Additionally, the step bit tool features 7/8 in, 1-1/8 in, 1-7/32 in, 1-1/4 in, and 1-3/8 in convenient laser metric markings for a quick and easy product and size identification.