The knipex plier wrench acts as a r eplacement for both metric and imperial wrenches spanners due to the parallel clamping jaws you have great flexibility when working with any sized materials the action of the jaws allows quick tightening and release of bolted connections using the ratchet principle features jaw opening width 46 mm total length 250 mm ideal replacement for both metric and imperial spanners reliable hinge bolt excellent force transmission suitable for work