The Milwaukee® Shockwave™ Impact Duty 50PC Drill & Drive Set Is Engineered to Be The Most Durable, Best Fitting Driver Bit Driver Bits On The Market. The Wear Guard Tip™ Delivers Increased Wear Resistance Which Protects The Impact Bit'S Fit Over The Life Of The Bit. The Shockzone™ Is Optimized For Each Tip Type and Length Of Driver Bit In The Set to Absorb Peak Torque and Prevent Breaking. The Driver Bit Driver Bits Are Made From Custom ALLOY76™ Steel and A Proprietary Heat Treatment Process to Extend Bit