It is suitable for quick-release pedals, after being removed, it can be placed on the frame, or on any hole where m5 screws can be installed. The diameter of the quick-release button hole is 10mm, which is suitable for installation on a 10mm axis. If it is installed on a frame such as 412, with an m5 screw, an m5 conversion base needs to be added. Material:Aluminum Color:Black, Silver, Red, Gold Package Included:1PCS