Alloy steel forgings: provide maximum durability - Four bolt back head design: stands up in rugged use - Quick change latch type forged retainer: simple change of chisel - Hex shank: possible to use asphalt cutters and spades - With optional muffler and anti-vibration handle Piston Diameter ( mm ) / 44.45 Piston Stroke ( mm ) / 85 Blow per min. ( b.p.m ) /1,550 Net Weight ( kg / lb ) / 15 / 33 Overall Length ( mm ) / 564 Air Consumption ( m3/min) / 1.4 Air Hose ( mm ) / 12.7 Air Inlet Size ( pt ) / 1 ⁄ 2 Shank Size ( mm ) / 7/8 x 3-1/4 or 1x4-1/4