ZG7150-0 50 single weight bit

50 single weight drill bit is installed in the bottom of the drill pipe, the top of the drill bit is inlaid with alloy, easy to drill pipe drilling, the drill barrel on both sides of the two nozzles, nozzle diameter between 1.6~3.0mm, for some soft geological structure empty to the end, no need to replace the drill bit, you can slowly lift rotary jet, improve work efficiency.