Air Paving Breaker Weight Class 35 lb Shank Size 1 in x 4 1/4 in Maximum Blows per Minute 1 250 bpm Piston Bore Size 1 3/4 in Piston Stroke Length 6 1/4 in Retainer Type Latch Vibration Reducing Handles No Sound Reducing Muffler No Air Inlet Gender Male Air Inlet Size 3/4 in Air Inlet Type NPT Air Consumption 49 cfm For Use On Concrete Handle Type T-Handle Hex Shank Size 1 in x 4 1/4 in Kit Contents (1) Bare Tool Minimum Hose Size 3/4 in Primary Material Application Concrete