Hybrid drill bit combing fixed-cutter and roller-cone. It is a new design, new technology, wide range of bit. Hybrid bit combine the advantage of tricone rock bit and PDC bit, it has be tested for many times. and it is proved thant it has a good performan
Wholesale dragon drill high quality,we offer you cheap price good sell drill in wholesalerModel: CF6133Rated Voltage(V~): 220VRated Frequency(Hz):50HZRated Power Input(W):420WNo-Load Speed(r/min):550r/minMax.Drilling Capacity:13mmColor box and standard ca