OTC's air powered hydraulic pump is an ideal all-around power source, for use with a variety of rams, presses, & hydraulic pullers, that develops 10,000 PSI hydraulic pressure at 100 PSI air pressure Powerful unit features a two-stage release mechanism, internal relief valve, and a 3/8 inch female NPT oil port for convenient hookup to a wide variety of hydraulic powered equipment Onboard capacity of 98 cubic inches of usable oil ensures you have the supply needed to power a wide range of equipment Convenient foot pedal design allows fine control of pump while keeping both hands free Backed by OTC's Lifetime Marathon Warranty