The tail hook is a frame accessory. It varies according to the frame. It is not universal. There are many frame manufacturers and many tail hook molds. The lifting lug model in our shop basically meets the common frame tail hook configuration. Installation Notes 1. The material of the tail hook is aluminum alloy with low hardness. The installation screws must be rubbed lightly, and do not use brute force. Some buyers think that the tighter the screw, the better. This is wrong. Also, be sure to align it when installing it, dont screw it in crookedly. Be sure to distinguish the front and back, it is also easy to damage the tail hook wire. 2. If your tail hook is often deformed and broken during riding, please check whether there is any problem with the rear derailleur and shifting system. The effect of the tail hook is the same as that of the fuse. If there is a problem with the shifting, and the new tail hook is replaced, it will also be pulled off or stuck. Special reminder for those riders who like to play heavily (jumping, jumping steps, advancing wheels, tail-flicking). Colour: Black Product Include: 1x Bicycle Tail Hook