Air Digger Hex Shank Size 7/8 in x 3 1/4 in Piston Bore Size 1 11/64 in Piston Stroke Length 2 1/2 in Maximum Blows per Minute 2 350 bpm Retainer Type Hitch Air Inlet Size 3/8 in Air Inlet Gender Female Air Consumption 45 cfm Air Inlet Type NPTF Tool Weight 21 lb Application Bridgework Digging Clay Frozen Ground Horizontal Concrete Demolition Tunneling Features Extra Long Nozzles Multiple Retainer Configurations Three-Finger Inside Trigger Handle Type D-Handle