Our SHOCKWAVE Impact Duty™ QUIK-CLEAR™ 2-in-1 Magnetic Nut Drivers feature the Most Durable QUIK-CLEAR™ Magnet and 2-in-1 size versatility. 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 5/16" and 3/8" nut driver sizes on one shank to allow for maximum versatility when driving hex head screws on the jobsite. The QUIK-CLEAR™ 2-in-1 Magnetic Nut Drivers feature a powerful Impact Duty™ magnet that prevents it from loosening over time to enable a consistent secure grip and unyielding fastener engagement. The optimized SHOCK ZONE™ absorbs peak torque and prevents bit breakage.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.