Materials: steel, nylon Packaging includes: 1 * bicycle trailer accessories tractor head Suitable for quick release or alloy wheels. Not applicable to disc brakes. Equipped with a complete connecting arm and plug, it can be easily installed without any additional tools. The range of trailer hooks can be compatible with electric bicycles and bicycles. This article is a practical traction solution coupling wheel. Made of sturdy steel and nylon straps, convenient to use. Features: 1. This project is a practical bicycle trailer hook for towing solutions. 2. Made of sturdy and durable metal and nylon strap. 3. The hook adapter can be compatible with both general-purpose bicycles and electric bicycles. 4. Run on fast release or flat axle wheels. Not applicable to disc brakes. 5. Equipped with a complete hook arm and hook connector, it can be easily installed without the need for other tools. 6. The hook adapter can be compatible with both general-purpose bicycles and electric bicycles. Specifications: Size: 20x5x2.5 cm