Pneumatic pick is lighter, more flexible and convenient operation. pneumatic breaker Hammer suitable for operating all around of work, especially in narrow space, upper or climbing direction. pneumatic jack hammer can stop working automatically when the solid object is broken.It's widely used in coal mining, soft rock, digging pits for post brackets, digging slots, breaking concrete, frozen earth in construction and installation engineering or constructing works in casting industries. Main Parameter Model G7 G9 G10 G15 G20 G35 G90 Weight 7.2kg 9.5Kg 10.6Kg 12Kg 20kg 20Kg 42Kg CylinderDia. 35mm 37mm 38mm 42mm 40mm 45mm 67mm Pituitarytrip 120mm 130mm 155mm 160mm 170mm 160mm 148mm Workingpressure 0.63Mpa 0.63Mpa 0.63Mpa 0.63MPa 0.63Mpa 0.63MPa 0.63MPa SCFM 20L/S 25L/s 20L/S 26.5L/s 27L/S 22.5L/s 41L/S InnerDia.