Milwaukee® Shockwave Impact DutyTM Magnetic Nut Drivers are engineered for extreme durability. Made from proprietary steel and heat treated to control hardness, the ShockwaveTM 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 ShockwaveTM 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. Set includes the following: 1/4" x 1-7/8, 5/16" x 1-7/8", 3/8" x 1-7/8" and 7/16" x 1-7/8" Nut drivers.