Milwaukee Shockwave Impact Duty Step Bit, #4 3/16"-7/8"

Milwaukee Impact Duty Step Bit, #4

The 48-89-9244 Milwaukee Impact Duty Step Bit, #4 is a rugged, impact-optimized step bit designed to deliver fast, accurate hole starts and long service life when drilling in shop and jobsite conditions. Built with a Titanium Aluminum Nitride (TiAlN) coating for 5X longer life, it features the Rapid Strike Tip™ and a dual spiral flute to produce up to 2X faster holes, while the optimized SHOCKZONE™ helps reduce early shank breaks. The bit includes 13 laser-engraved steps for quick, confident size identification from 3/16" to 7/8".

Country of Origin
Made in the U.S.A. with global materials

Key Features / Specifications

• Model / Part Number: 48-89-9244
• Brand / Series: Milwaukee Impact Duty
• Product Type: Impact duty step bit
• Step Bit Size / Range: #4 — 3/16" to 7/8"
• Number of Steps: 13 steps
• Compatibility: Optimized for impact drivers, drill/driver compatible
• Coating: Titanium Aluminum Nitride (TiAlN) — 5X longer life than competitive impact step bits
• Tip Design: Rapid Strike Tip™ for fast, accurate starts
• Flute Design: Dual spiral flute + Rapid Strike Tip™ for up to 2X faster holes
• Shank Protection: Optimized SHOCKZONE™ to reduce early shank breaks
• Markings: Laser-engraved steps for clear size identification and stopping on size

Ideal For

• Fast step-drilling with impact drivers while maintaining clean, controlled starts
• Drilling applications where extended bit life is needed (thanks to TiAlN coating)
• Users who want quick size changes and easy stopping with laser-engraved steps
• Jobsite work where shank durability matters to help prevent early breakage
• General drilling with drill/drivers when a step bit is the best fit for the task