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.All certified to 1,000 V ac and 1,500 V dc. Every screwdriver individually tested to 10,000 V.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.