Gardner Bender (GB) SCE-257, ProTect, Insulated, Electrician's, 1/4 Inch Slotted Screwdriver Molded shaft insulation rated to 1000 volts provides secondary protection against electrical shock. Unique ergonomic grip is engineered for maximum torque with minimum effort. Hardened chrome vanadium steel shaft provides strength and durability. Tip size imprinted on each handle for handy reference.