A pipe wrench is any of several types of wrench that are designed to turn threaded pipe and pipe fittings for assembly (tightening) or disassembly (loosening) The Stillson wrench is an adjustable wrench (spanner) with hardened serrated teeth on its jaws The hard teeth bite into the softer metal of the round pipe, and provide the grip needed to turn a pipe, even against fair resistance Pipe wrenches are not intended for regular use on hex nuts or other fittings. Dimensions are Length X Width X Height (cm) : 42X9.5X3.5 & Weight (kg) : 1.925 Teeth and jaw kits (which also contain adjustment rings and springs) can be bought to repair broken wrenches, because that can be cheaper than buying a new one. Repairing a high-quality wrench can be more economical (taking into account the total cost of ownership) than either buying a new high-quality wrench or buying cheap wrenches repeatedly