1,Cobalt agent formula segments of the Diamond drill bit 2,High quality steel of bit body 3,Specifications are upon request wet diamond core drill bitOur diamond drill bits are used for makeing holes in concrete,reinforced concrete,brick wall,refractory marble and granite.Outer diameterCore-Bit’s Length (mm)Dimension of tooth (mm)Number of teethmmLengthHeightThickness16350/400107.54.0220350/ ...