Shockwave Impact Duty driver bits can be used in impact drivers or drill drivers. Built to deliver extreme durability for the most demanding applications. Optimized Shock Zone geometry is unique for each tip type to provide longer life and absorb more torque versus other impact bits. Custom machined tip prevents stripping and reduces wobble. Custom Alloy76 Steel maximizes resistance to wear and shock. For use with Torx security screws. Set includes 1 each, 1 In. Torx security insert bits: T7, T8, T9, T10, T15, T20, T25, T30, T40.