Shockwave, 2", ECX Power Bit #1 & #2 Combo Pack, Impact Duty Driver Bits Are Engineered For Extreme Durability, Made From Proprietary Steel & Heat Treated To Control Hardness, Geometric Design Provides The Shock Absorption Zone To Extend Life, The Forged Tip Allows For A Secure Grip & Maximum Contact Eliminating Stripping Or Slipping.