... button bit, retract button bit, thread button bit.With ISO certificate & quality control.Button bits with 6tips, 7tips, 8tips, we do ... rod. 19mm, 22mm; Shank hex. 19mm, 22mm) B. Thread Button BitThread button bit (33mm, 35mm, 45mm, 51mm, 57mm, ... --89mm, T51--115mm, T51--127mmPlease feel free to contact with us for more detailed specifications or catalog.Thread384245485156647689102115127R25√√ R28 ...