for wrench sizes up to 85 mm 3 38", for large screw connections, also with pressure-sensitive surfaces such as plastic, copper, brass, stainless steel and chrome, adjustable screwing tool, replaces various expensive, large open-end wrenches up to 85 mm or 3 38", also ideal for gripping , holding, pressing and bending of workpieces, smooth jaws, also for the careful assembly of high-quality screw connections made of brass, gunmetal or stainless steel, no damage to the edges of sensitive fittings thanks to play-free, full-surface contact, adjustment at the push of a button directly on the workpiece, stepless gripping of all wrench sizes up to to the specified capacity by means of parallel jaws, optimized adaptation to the workpiece with a hand-friendly grip position, secure locking of the joint bolt: no unintentional adjustment, the stroke between the gripper jaws enables quick tightening and loosening of screw connections using the ratchet principle, high clamping force t with 10-fold manual power amplification, chrome vanadium electric steel, forged, oil-hardened