Step Drill Bit #12, 7/8" - 1-3/8"

Milwaukee 48-89-9212 #12 Step Drill Bit with JAM-FREE Dual-Flute Design

The Milwaukee #12 Step Drill Bit is designed for high-efficiency drilling in sheet metal and other thin materials. Featuring a dual-flute geometry, this bit reduces heat buildup and minimizes jamming during operation. The Rapid Strike™ tip provides fast, accurate starts without the need for center punching, and the 3-flat Secure-Grip™ shank prevents bit slippage under load.

Engineered from high-speed steel with a corrosion-resistant black oxide finish, this bit is optimized for cordless drill performance. Laser-engraved reference marks ensure consistent depth control across applications, and the 1/4" hex shank allows for quick changeout with compatible chucks and impact drivers.

Product Features

• Dual-Flute Design: Increases drilling speed and reduces the risk of bit binding
• Rapid Strike™ Tip: Enables immediate starts and reduces walking
• Laser-Etched Size Indicators: Provide high-visibility reference marks for precision hole sizing
• Secure-Grip™ Shank: 3-flat design locks securely into standard 1/4" chucks to eliminate slippage
• Black Oxide Coating: Enhances wear resistance and reduces corrosion

Technical Specifications

• Bit Size Range: 7/8" to 1-3/8"
• Material: High-speed steel
• Finish: Black oxide
• Shank Type: 1/4" hex, 3-flat Secure-Grip™
• Intended Use: Step drilling in sheet metal, plastic, and similar materials

Application Notes

Designed for use with high-speed cordless drills, this step bit is ideal for controlled drilling through metal panels, junction boxes, and conduit enclosures. For optimal tool life, apply consistent pressure and moderate RPMs to minimize heat accumulation. Avoid use on hardened steel or thick structural materials outside the bit's intended range.