Thread sizes: R22, R25, R28, R32, R35, R38, T38, T45, T51, ST58, GT60,
bit diameter: 43mm-152mm
Button bit face design: flat face, drop center, uniface
Skirt designs: normal, retrac, straightrac;
Tungsten carbide (Buttons): Spherical, ballistic and Conical.
See more: https://www.agdrill.com/Thread-Button-Bits-p.html