For stripping paper insulated cables with diameter from 27 to 37 mm (1.5/64 ~ 1.1/2"). Knifes with special Titanium-Nitride coating (TIN) to achieve longer life, faster cutting and less wear. The large adjustment screw allows for effortless adjustments. Automatic adjustment from round~ to length cut. User benefits from a secure grip achieved by the non-slip padding. Including TIN coated spare blade in the handle. TUV / GS approved..