The job isn’t finished until everything is tightened down. Precision insulated tools fit and grip the fastener properly to apply maximum torque without damage to the head. Hardened chromium-molybdenum-vanadium (CMV) steel blades minimize wear. The last thing you want is to have your driver slip out of the screw head and possibly contact a nearby live conductor.PRODUCT FEATURES:- Ergonomic handle that adapts to user’s hand, causes less strain and work fatigue and provides maximum torque. - Full length, impact proof handle core is coated with soft-grip outer material, hanging hole for extra security, and anti-roll handle design. - Slim insulated shaft allows access in hard to reach areas. - Manufactured from CMV steel for superior durability.