Milwaukee® Cobalt Step Bit Kit (3PC)

Milwaukee® Cobalt Step Bit Kit

The Milwaukee 48-89-9291 Cobalt Step Bit Kit is a high-performance 3-piece drilling solution built for fast, clean, and precise hole making in metal—especially stainless steel where lesser bits tend to give up early. Engineered with cobalt construction and a Rapid Strike™ tip, these bits start quickly, run cooler, and last significantly longer—up to 15X longer in stainless and capable of over 1,000 holes in mild steel. With dual-flute design for heat management and laser-engraved markings for accuracy, this set is made to keep your drilling smooth, efficient, and frustration-free.

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

Key Features / Specifications

• Model / Part Number: 48-89-9291
• Brand / Series: Milwaukee® Cobalt
• Product Type: Cobalt step drill bit set (3-piece)
• Material: Cobalt steel construction for extended life and heat resistance
• Performance: Up to 15X longer life in stainless steel
• Capacity: Up to 1000 holes in mild steel
• Material Compatibility: Recommended for up to 14-gauge steel
• Tip Design: Rapid Strike™ tip for faster, more accurate starts (up to 2X faster)
• Flute Design: Elongated dual-flute for improved heat management
• Step Design: Smaller steps for smoother drilling and better control
• Markings: Laser-engraved size markings for easy identification and accuracy
• Shank Type: 3-flat Secure-Grip™ shanks to reduce slippage in chuck
• Optimization: Designed for cordless drill performance
• Speed Use: Low speed for stainless steel, high speed for mild steel

Ideal For

• Drilling clean, accurate holes in stainless and mild steel
• Electricians, HVAC techs, and fabricators needing step drilling versatility
• Jobs requiring fast starts and smooth hole enlargement without bit walking
• Users who want long-lasting bits that don’t burn out halfway through the job
• Anyone tired of step bits that tap out early and leave you finishing the job with a backup plan