The Greenlee GSB01 is a compact multi-hole step bit designed for electricians who need precise, clean holes from 1/8" to 1/2" through steel enclosures, aluminium sheet, copper bus, and plastic laminates without swapping bits — ideal for device knockout work, device box installations, and panel wiring on tight residential and light commercial jobs. With 13 drill stages across a compact size range, the patented split-step design and progressive cutting edges optimise chip load and torque efficiency to reduce stalling and deliver more holes per battery charge. A durable split-point tip, improved double-flute chip evacuation, and laser-marked sizing ensure consistent precision and fast identification in confined work areas.

Specifications

Type Multi-hole Step Bit
Application Mild steel, aluminium, brass, copper, wood, fibreglass, plastics, and laminates
Number of Drill Stages 13
Minimum Drill Diameter 1/8" (3.2 mm)
Maximum Drill Diameter 1/2" (12.7 mm)
Maximum Sheet Metal Thickness 10 gauge (3.5 mm)
Shank Three-flat, fits all 1/2" drill chucks