We can supply all kind of button bits with rope thread R25, R32. R38, R35 and T thread, T38, T45, T51, T60 etc Main button bits is R32-43MM. R32-45MM, R32-51, R32-64, R32-76, T38-64, T38-76MM, T38-89, T38-102MM T45-76MM, T45-89MM, T45-102MM T51-89MM. T51-102MM, T51-127 etc We can offer you all face design, flat face, drop-center fact. And normal body and retrac body.