Heavy Duty High Pressure Grease Gun, 7500 psi, 1/8 in NPT(F), Nozzle/CouplerPrecision machined, all steel handle, body, and guard bracket provide durability and longevity Unique, precision control inlet check valve provides ease of handle operation even with increase in pressure Knurled handle for positive grip Handy trigger guard prevents pinching Reversible inlet check seat and hydraulic jaws provide double life