Comfort technology designed trigger system actually helps the operator keep the trigger open

Fits 3/4" Garden Hose Thread

and a lightweight housing

Replacement pump fits most 4 to 8hp gas engines with 3/4" shaft

If the hole is on the arm nearest the pump inlet you have the EZ-SX pump

Dynablast Pistol Grip 2000psi Model:Pistol Grip Only Comfort technology designed trigger systemPressure washer gun. Comfortable no trigger pistol grip gun with optional 18" extension. Model: Pistol Grip Application: Industrial Duty Max Pressure: 2000 psi Max Temperature: 200 Deg F Max Water Flow: 12 gpm Inlet: 3 8" FPT Outlet: 1 4" FPT (1 4" MPT with Extension) Lance: 18"