Rennsteig Stripper. This Rennsteig Solar Wire Insulation Stripper for 16, 14, 12, 10 AWG (Part number 708 226-1 6 RT) uses a two-stage stripping action. The first step cuts the wire insulation, and the second step then gently pulls the insulation from the wire to avoid pinching and deformation of the cable ends. A modular tool design lets you change blades for specific applications. Once your blades wear down you simply replace the blades saving money.