Milwaukee® 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.