The Klein Nut Driver features a plastic coated shank for circuit protection only (not insulated). The coating resists cutting, cracking, and chipping. The hollow shaft facilitates work on stacked circuit boards or other long bolt applications. The internal flanges provide solid, twist-resistant shaft anchor. The premium chrome plated finish provides corrosion resistance. The cushion grip handle gives greater torque and comfort, and is color coded for quick and easy identification. The Tip-Ident quickly identifies nut driver and size.