SHOCKWAVE™ Impact Duty™ #3 3/16 - 3/4"

The Milwaukee 48-89-9243 is a #3 SHOCKWAVE™ Impact Duty step drill bit, covering 3/16" to 3/4". It’s built specifically for impact drivers, making it a tougher, longer-lasting version of the standard #3 step bit you mentioned earlier.

Hole range

• Minimum: 3/16"
• Maximum: 3/4"
• Steps: ~10 sizes (in 1/16" increments)

This overlaps directly with the traditional #3 step bit (1/4"–3/4"), but starts slightly smaller and is impact-rated.

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 – faster starts, less walking
• Dual spiral flutes – up to 2× faster hole cutting
• SHOCKZONE™ shank – reduces breakage under high torque
• Laser-etched markings – easy to stop at exact hole size

Best Uses

• Electrical panel holes (1/4"–3/4")
• HVAC duct and sheet metal work
• Enclosures and control panels
• Enlarging existing holes cleanly
• General fabrication in thin steel, aluminum, and plastic