Milwaukee® SHOCKWAVE Impact Duty™ Magnetic Nut Drivers are engineered for extreme durability and up to 30x life. Made from proprietary steel and heat treated to control hardness, 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. Broadly targeting cordless users, the SHOCKWAVE Impact Duty™ accessory line is not only ideal for heavy duty impact applications, but delivers a full system solution for all the user's drilling and fastening needs.