Features and Benefits:?Custom Alloy76? Steel is engineered to extend life?Strong magnetic tip for fastener retention?Color-coded band for easy size identification?Provides up to 30X life?Designed for heavy-duty impact applications?Designed for use with Impact Drivers and Drill DriversMilwaukee? SHOCKWAVE? Impact Duty? insert magnetic nut drivers are engineered to be more durable delivering up to 30x life. Made from our Custom Alloy76?, the SHOCKWAVE? Impact Duty??magnetic nut drivers feature a powerful magnet allowing for a secure grip and unyielding bit engagement. The bits feature color-coded rings for quick and easy size identification and a chamfered edge to allow for fastening in tight spaces.