Material: This bicycle chain keeper uses aluminum alloy and plastic as the material, which is wear and so that can be reused for a long time. Replacing part: This quick release bike cleaning holder is suitable to be used as spare part to replace the old the broken part of the bicycle. Wide usage: The bikes hub repairing accessory has a wide range of using occasions, not only can be used in repairing but also can be used in bicycle cleaning. Detachable: This bike chains replacement part is designed to be detachable, which is more convenient especially when you repairing or washing the chain. Easy to install: The detachable bicycle repairing tool is small in size with simple structure which can be installed on the bike easily. Colour:black Material:Aluminum alloy + plastic Size:13 x 8 x 5cm Package Contents: 1 x Bicycle Chain Keeper Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.