Upgraded Adjustable Hook: This adjustable hook features an anti-slip gasket to protect your equipment. Fits most round tubes with a diameter of 2.1–3.6 cm (0.82–1.41 inches). Easy to install: This knee scooter hook can be mounted on a round tube at any desired angle. Versatile use: The double utility hook is suitable for electric scooters, e-bikes, bicycles, motorcycles, kids' kick scooters, all-terrain knee scooters, and more. Made from high-quality aluminum alloy with an anti-dislodging nut, chamfered design, and rubber sleeve protection to help prevent scratches. Safe Design: Features a refined chamfered edge and rubber sleeve to help avoid accidental scratching. Product Name: Scooter Hook Application: E-bikes, bicycles, motorcycles, kids' kick scooters, all-terrain knee scooters, etc. Color: Black Material: Aluminum Alloy Package Contents: 1 x Hook (only the listed item included; other items not included) Note: Lighting and display differences may cause slight color variations between the image and the actual item. Measurement may vary by +/- 1–3 cm.