High-quality material: The bicycle roof bracket is made of aluminum alloy, which is durable, strong in carrying capacity, compact and portable. Scope of application: This bicycle roof mount is suitable for M5 x 100mm, M12 x 100mm, M15 x 100mm, M15 x 110mm quick release axles and quick release, suitable for most car models. [Scratch Resistant]This bike roof mount is strong and strong enough to hold your bike on the frame without worrying about scratching your car. EASY TO PORT: This bike is roof mounted with all the included small size adapters allowing you to carry them with ease. Wide Application: This bike rack can be used in many vehicles such as cars, SUVs, trucks, and meet your needs for transporting bikes on road trips or camping . Can also be used for storage in garages, homes, and sheds. Colour:black Material:aluminum alloy Size:11 x 4 x 6 cm Package Contents: 1 x Fixer 1 x rear wheel pad 1 x Strap 4 x small iron blocks 4 x big iron block 8 x screws 1 x installation tool 8 x barrel shaft 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.