With the screw mounting design, the bike tail hook is easy to install and remove, which is very convenient to use.With excellent workmanship, the bike tail hook allows a certain amount of deformation to protect the derailleur from damage. It can be replaced to reduce the maintenance cost of frame.Made of high quality aluminum alloy material, the product is durable, sturdy and anti-rust.The length of the product is 6cm, the width is 4cm, and the height is 1cm.It''s suitable for road bikes, mountain bikes and bicycles.Item Name: Bicycle Tail HookMaterial:Aluminum AlloySize:6cmx4cmx1cm/2.36inx1.57inx0.39inNotes:Due to the light and screen setting difference, the item''s color may be slightly different from the pictures.Please allow slight dimension difference due to different manual measurement.Please check your bicycle transmission bracket model to find out which type fit, or we can not help this Package Includes:1 X Bicycle Tail Hook