Rubber strap fits around objects of any shape to loosen, tighten or hold without surface damage. Large wrench has a 24 x 3/4 in strap-grips items up to 6 in Dia. Rubberized non-slip grips. Rubber strap wrenches are ideal for use on an oil filter, jar lids, plumbing fixtures and pipes. Just wrap the rubber strap around the object, then insert the end into the slotted handle design.