Step Bit Set (#1, #4)

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 shank for all 1/2... drill chucks....;Laser markings for quick, easy product and size identification.;Replaced 03607