Leaves wires undamaged due to precision-ground blade shapes, even multi-stranded conductors are stripped gently. During stripping, the wire is held firmly by clamping jaws. Built-in adjustable length stop for consistent stripping length during repetitive work. A spring leads the stripper back to the starting position. Replacement blade part number 12 19 180. Pliers body is made of aluminum. Blade is made of special tool steel, oil-hardened.