Common specifications and models of the threaded drill bits:

The diameters of common threaded drill bits include 35mm, 38mm, 41mm, 43mm, 45mm, 48mm, 51mm, 54mm, 57mm, 64mm, 76mm, 89mm, 102mm, 115mm, 118mm, 127mm, 140mm, 152mm.

The common threaded drill bits have R threads of R22, R25, R28, R32, TR35, R35 and R38, which are mainly used with low-power rock drills for small holes,  T threads of T38, T45, T51 and T60 which are generally used for medium and large threaded drill bits, and ST58, ST68, EL60 and EL68 threads which are used for large threaded drill bits to match high-power rock drills.