MILWAUKEE® SHOCKWAVE Impact Duty™ Magnetic Nut Drivers are engineered with the most durable magnet for a secure grip and unyielding bit engagement, lasting the life of the nut driver. The Magnetic Nut Driver securely holds fasteners during application setup by providing unyielding bit engagement. Made from heat-treated CUSTOM ALLOY76™ steel to control hardness and extend bit life. The optimized SHOCK ZONE™ absorbs peak torque and prevents bit breakage. Milwaukee Magnetic Nut Drivers feature a chamfered edge for maximum fastener engagement while the improved hexagonal geometry provides the best fit and reduces stripping during use. The nut drivers also have color-coded bands for easy diameter selection. Designed for use with impact drivers and drills.