Adapts 35mm Center Lock rotor-mount splines to accept an International Standard 6-bolt, 44mm BCD rotor Does not fit Saintstyle 47mm Oversize Center Lock, and will not work with thicker, aluminum-carrier Hope 2005+ style Mono-series rotors Designed for up to 210mm rotors Tabs in adapter mate to (6) M5 rotor bolt holes. Secured by Center Lockstyle lockring, sandwiching 6-bolt rotor to adapter Lockring requires a 16notch external bearing bottom bracket wrench CLIS adapter is black and lockring is black with silver etching: 29g