Air Hammer, Medium Duty, 2 5/8 in Stroke Length, 1/4 in NPT Female Air Inlet Size/ DIAMETER: 0.401 INCHES NOMINAL HANDLE TYPE: PISTOL GRIP IMPACT BLOWS PER MINUTE: 3500.0 AIR INLET NOMINAL THREAD DIAMETER: 0.250 INCHES PISTON STROKE LENGTH: 2.625 INCHES NOMINAL ACCOMMODATED TOOL SHANK STYLE: AB15 PARKER TAPER PISTON BORE DIAMETER: 0.688 INCHES NOMINAL HOSE DIAMETER: 0.375 INCHES NOMINAL SPECIAL FEATURES: GENERAL DUTY; 7-26/32 IN. O/A LG MATERIAL: STEEL