Milwaukee 25/64" Thunderbolt Titanium Coated Drill Bit 48-89-2222

ENGINEERED FOR MAXIMUM CORE STRENGTH AND THERMAL RESISTANCE

The Milwaukee Thunderbolt Titanium Coated Drill Bit is designed to eliminate the most common failure point in high-torque drilling: core breakage. By utilizing the proprietary Thunderbolt web—a significantly thicker core than standard HSS bits—this bit provides the structural rigidity required to withstand side-load pressures and binding in heavy-gauge metals. The titanium nitride coating acts as a critical thermal barrier, dissipating heat to maintain edge sharpness and extending the tool's service life up to 3X over black oxide alternatives. For precision starts, the 135° split point bites into the material on contact, preventing the bit from walking across finished surfaces or curved stock, while the 3-flat Secure-Grip™ shank ensures that all the torque from your M18 FUEL drill is transferred directly to the workpiece without slipping in the chuck.

• / Thunderbolt® Web: Thicker core design provides ultimate strength and protects against breakage during aggressive side-loading.
• / Titanium Nitride Coating: Reduces friction and heat build-up to keep the cutting edge sharp for up to 3X longer life.
• / 135° Split Point: Delivers a precision start and prevents bit walking for immediate penetration in metal, wood, and PVC.
• / Parabolic Flute: Optimized geometry clears chips and debris rapidly to prevent clogging and overheating in deep-hole applications.
• / Secure-Grip™ Shank: 3-flat design provides a non-slip connection in the drill chuck, maximizing power transfer and safety.

WHAT'S IN THE BOX

(1) 25/64" Thunderbolt Titanium Coated Drill Bit (48-89-2222)