Our SHOCKWAVE™ impact-duty magnetic nut drivers are engineered with the most durable magnet to withstand heavy-duty applications throughout the life of the nut driver. The magnetic nut driver securely holds screws during application set-up providing unyielding bit engagement. Made from heat-treated custom ALLOY76™ steel to control hardness for extended bit life. The optimized SHOCK ZONE™ absorbs peak torque and prevents bit breakage. Our magnetic nut drivers feature a chamfered edge for maximum screw-head engagement while the improved hex geometry allows for the ideal fit and reduced stripping during use. The nut drivers also feature color-coded bands that aid with selecting the right diameter. Designed for use with bit holders in impact drivers and drill drivers.