Greenlee GSB09 #9 Step Bit 1-1/8″

Patented Non-Skid Split-Tip Design. Progressive Dual-Flute Chip Evacuation. Versatile 16-Step Configuration from 1/4" to 1-1/8".

The Greenlee GSB09 Multi-Hole Step Bit brings high-velocity single-tool hole enlargement, effortless sheet metal penetration, and trade-grade structural precision directly to your heavy-duty mechanical toolkit. Purpose-built to eliminate the frustrating downtime of continually swapping out large twist drill bits, the dangerous tool walking that ruins expensive control enclosures, and the sudden, violent motor stalling common when drilling broad holes with basic stepper cones, this premium American-engineered multi-hole step bit sets an absolute commercial baseline. It equips professional electrical wiremen, HVAC contractors, sheet metal fabricators, and commercial pipefitters with an elite cutting asset optimized to punch clean conduit holes, expand junction box openings, deburr structural sheet panels, and drill flawless pathways through plastic housings.

Outstanding mechanical aggression and premium high-speed tool steel composition form the baseline architecture of this professional stepper bit. The core features a patented split-tip and split-step design that dynamically bites into raw materials on initial contact, entirely preventing skidding even when positioned over rounded pipe walls or uneven structural framing elements. Its advanced double-flute construction shares the mechanical workload evenly across two cutting surfaces, optimizing the total chip load to ensure faster cutting speeds and more holes drilled per battery charge. Engineered with a secure 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® GSB09 Multi-Hole Step Bit Rules the Tool Pouch:

• 16 Distinct Sizes in 1 Tool: Eliminates the need to carry full cases of large twist drills by stepping seamlessly across a continuous 1/4" to 1-1/8" 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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