h417

1)Baoxing 2)The 417 tci bits are used to drill low compressive strenght ,very soft formations 3)high quality and low price 1)The 417 tci bits are used to drill low compressive strenght ,very soft formations. 2)TCI bits maximize the use of both conical and chisel tungsten carbide inserts of large diameters and high projection .this cutting structure design,combined wit maximum cone offset, ...

Size:9*5.5*3.5cm , with magnetic