Efficiently operate any single-acting rams up to 55 ton capacity in many industrial and construction applications. Provides up to 10,000 PSI with standard shop air supply of 90-175 PSI. Made of durable, lightweight corrosion-free aluminum. Built-in pressure by-pass system protects overload operation. User friendly foot-actuated design for easy control of moving fluid at tremendous rate; use 3/8" NPT fluid coupler