The machine(Y6) is a tool for the secondary blasting in quarry and especially for rocking 20mm hose in marble and granite,it has characteristic of low weight,reasonable structure,handy use and little air consumption. Specification: Weight : 6kg Length : 426mm Air pressure : 0.4-0.63Mpa Air consumption : â¤9.5L/S Air pipe dia : 13mm Impact frequency : >51Hz Drill bit dia : 20mm