???Instruction The machine has light-weight, simple structure, operate facility, auto stop when bump objective into pieces. It is suitable for drilling in mine, mining the soft ore; diging pole and feet-hole, karating water-ditch; or crashing concrete and clay in construction work; or working in the situation that need producing the impact in the mechanical industry such as assemble and unassemble the cincture pin in tractor, panzer and so on. ???Specification Exterior Dimension (L?W?H) 456?160?110mm Weigh 7.2kg Rammar dia 35mm Rammar stroke 120mm Rammar weigh 0.6kg Work air pressure 0.4~0.49Mpa Impact energy(0.49Mpa) âÂ¥30J Impact frequency(0.49Mpa) âÂ¥21.6Hz Air consumption(0.49Mpa) â¤20L/S Air pipe inner dia 19mm