To pave and break concrate foundation installing engenering to break other hard things
    The Paving breaker model B47 is tools with compressed air as its power.The compressed air is distributed alternatively through the distributing valve into either end of the cylinder assembly so that the hammer inside is made to carry on a reciprocaql motion which impacts the shank of the steel chisel by the tappet drives the chisel into the concrate foundation and makes them split into huge pieces.