Milwaukee® Shockwave™ Impact-duty™ magnetic nut drivers are engineered for extreme durability and up to 10X 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 and a chamfered edge to allow for fastening in tight spaces. 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. Proprietary steel and heat-treated process for maximum strength and durability Color-coded band for easy size identification Strong four-prong steel jaws Chamfered edge for fastening in tight spaces Radius corners drives on flats to reduce stripping and breakage