Greenlee GSB01 #1 HSS Step Bit 1/2″

Patented Non-Skid Split-Tip Design. Progressive Dual-Flute Chip Evacuation. Versatile 13-Step Configuration from 1/8" to 1/2".

The Greenlee Multi-Hole Step Bit brings rapid single-tool hole drilling, effortless penetration speeds, and zero-compromise precision directly to your active trade setup. Purpose-built to eliminate the constant hassle of swapping out small twist drill bits, the dangerous tool skidding that mars expensive control panels, and the sudden motor stalling common with low-grade stepper cones, this premium American-engineered multi-hole step bit sets a standard for high-speed field installation. It arms commercial electricians, HVAC technicians, sheet metal fabricators, and property maintenance mechanics with a high-efficiency tool optimized to punch smooth holes through electrical junction boxes, create fast pilot centers for large knockout punches, deburr sheet metal panels, and segment plastic housings flawlessly.

Outstanding mechanical balanced aggression and premium high-speed tool steel composition form the baseline architecture of this professional Greenlee GSB01 Step Bit. The core features a patented split-tip and split-step design that dynamically bites into raw materials on initial contact, entirely preventing walking or skidding even when working over curved pipe profiles. Its advanced double-flute construction shares the mechanical workload evenly across two cutting edges, optimizing the total chip load to ensure faster cutting speeds and more holes drilled per battery charge. Engineered with an explicit 3-flat shank layout, the bit locks tightly into standard 1/2" keyed or keyless chucks to prevent spin-out, while clear laser-engraved sizing markers enable quick, foolproof step tracking under tough jobsite conditions.

Why the Greenlee® GSB01 Multi-Hole Step Bit Rules the Tool Pouch:

• 13 Distinct Sizes in 1 Tool: Eliminates the need to carry full cases of twist drills by stepping seamlessly across a continuous 1/8" to 1/2" operational profile.
• Patented Non-Skid Split Tip: Penetrates tough sheet metal and slick materials instantly without center punching, avoiding surface scratches or tool wandering.
• Progressive Split-Step Design: Balances torque efficiency dynamically across the cone to maximize drilling speed while significantly minimizing tool stalls.
• Improved Double-Flute Geometry: Accelerates overall chip evacuation and reduces friction-load heat, expanding cordless tool runtime and extending active cutting life.
• Slip-Free 3-Flat Shank Grip: Three parallel flat planes lock securely inside standard 1/2" chuck interfaces, eliminating damaging tool spin-out under heavy torque.

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