JACK HAMMER The pneumatic pick is suitable for drilling in concrete and clay,destorying hard or frozen stratum and other functions. It has characteristic of reasonable structure,high efficiency and handy use . Specification: Weight 37kg Length 733mm Rammer dia 57mm Rammer stroke 189mm Air pressure 0.63Mpa Impact frequency 18.3Hz Air consumption 34L/s Air pipe inner dia 19mm Lubrication capacity 30ml