This Mountain Road Bike Rear Hook is perfect for those who need to repair bikes. Its simple installation process means that you can easily install it without the need for any complex tools. It is suitable for most types of bicycles and can be replaced, which reduces the maintenance cost of the frame. Features -Color:Black -Material:Iron -Size:5.50X3.20X0.50cm/2.16X1.26X0.20in - It is suitable for most types of bicycles and can be replaced, which reduces the maintenance cost of the frame. - The tail hook is made of iron , which is easy to install on the frame for fixing the rear dial. - The tail hook designed with expand the flywheel velocity change more smoothly. - and compact shape, give your mountain bike a . - Made of iron materials, wear resistant and firm, durable and . Package list: 1 x bike tail hook