The Milwaukee Shockwave impact duty Quik-Clear 2-in-1 magnetic nut driver is the most durable, cleanable nut driver. The Quik-Clear cleaning mechanism allows for fast and easy removal of metal shavings from the magnet to prevent fastener head stripping. The 2-in-1 nut driver design offers 1/4 in. and 5/16 in. nut driver sizes on one shank to allow for maximum versatility when driving hex head screws on the job site. The Quik-Clear 2-in-1 magnetic nut drivers features a powerful magnet that prevents it from loosening over time to enable a consistent, secure grip and unyielding fastener engagement. The optimized Shock Zone shank absorbs peak torque and prevents breaking. Made from heat-treated custom Alloy76 steel to control hardness and extend bit life. The nut drivers feature two color-coded rings for quick and easy size identification. Designed for use with impact drivers and drill drivers.