Specification Chisel Shank Opening : 0.401 inch (10.2 mm) Bore Diameter : 1/2 inch (12.7 mm) Stroke Length : 2-1/4 inch (57.2 mm) Blows Per Minute : 2580 B.P.M Operating Air Pressure : 90 PSI (6.2 bar) Avg. Air Cons. : 6 cfm (170 l/min) Net Weight : 2.4 lbs (1.06 kgs) Min. Hose Size : 3/8 inch (10 mm) Rivet Size : 3/32 Steel Rivet Size : 1/8 Alum