Knipex s type pipe wrenches with rapid adjustment knipex 83 61 020 these s type pipe wrenches from knipex have been designed with a host of excellent features including the time saving precise adjustment of the gripping width directly on the workpiece push of a button while the guard prevents an operators fingers being pinched manufactured to a high standard with chrome vanadium electric steel forged oil hardened while offering high wear resistance due to the additionally hardened