1, Provide constant depth-contolled and width control grooving work in various brick, concrete, etc. 2, Combined triple disc saw blade on the groove width of 28.5mm for grooving work. 3, Fast and easy to do wall chasing job to one-time finish smooth slots and grooves without the residuum in the slots and grooves. 4, Highest increase the wall chasing efficiency. 5, Deep protection segment design to meet various cutting purposes in wall chasing progress without stuffing. 5, Alternative left-right segment layout with the newest cutting edge technology.