The SHOCKWAVE™ Power Bit Magnetic Nut Driver are engineered with a durable magnet to stand up to 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. The magnetic nut drivers feature a chamfered edge for maximum screw-head engagement while the improved hex geometry allows for the best 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 impact drivers and drill drivers.