SHOCKWAVE™ Impact Duty™ #1 1/8 - 1/2"

The Milwaukee 48-89-9241 is a #1 SHOCKWAVE™ Impact Duty step drill bit, covering 1/8" to 1/2" in 13 steps. It’s designed specifically for fast, repeatable hole drilling in sheet metal using an impact driver or drill.

Hole range

• Minimum: 1/8"
• Maximum: 1/2"
• Steps: 13 total (in small increments for precise sizing)

This makes it the smallest and most precise step bit in the SHOCKWAVE step lineup.

Key Features

• SHOCKWAVE™ Impact Duty design – optimized for impact drivers (also works in drills)
• TiAlN coating (titanium aluminum nitride) – up to 5× longer life than standard step bits
• Rapid Strike™ tip – fast starts with minimal walking
• Dual spiral flutes – up to 2× faster hole cutting and smoother operation
• SHOCKZONE™ shank – reduces breakage under high torque
• Laser-etched markings – easy to stop exactly at the desired size
• 1/4" hex shank – quick-change compatible

Best Uses

• Small electrical panel holes
• Pilot holes in sheet metal
• Thin steel, aluminum, brass, plastic
• Enclosures and control panels
• Cleanly enlarging existing holes

How it fits your step-bit lineup

• 9241 (#1): small precision holes (1/8"–1/2") ← this one
• 9204 (#4): mid-range (to ~7/8")
• 9205 (#5): large range (to ~1-3/8")
• 9208 / 9209 / 9212: large conduit + fabrication sizes