Cross Bits / Rock Drilling Tools Best Quality, Lowest Price, Most Satisfied Service 1) Threaded connection: R22, R25, R28, R32, R38, T38, T45, T512 ... ) Tapered connection: 6 ° , 7 ° , 11 ° , 12 °3) Diameter: 28-127mmMoreover, we can make various sizes of Cross Bits according to ... quality at the lowest price with the most satisfied service. Cross Bits (Manufacturer Supply)