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.