Hydraulic torque wrench is widely used in heavy duty bolt and nut tighening or dismantling. Ningbo Instruments Mechanics Co., Ltd offer different types of hydraulic wrench that differs in torque output, from square drive to hollow link, material differs from stainless steel to aluminum titanimum alloy, in different painting colors.  The hydraulic wrench is a powerful industrial tool which many others such as  pneumatic and electric wrenches can't parallel with. It is widely used in construction, marine, oil and refinery, mining, heavy machinery setup and repairs, wind turbine, shipyards, power station, nuclear station.