Bullet Points: 1、Practical Bicycle Trailer Hook: This project is a practical bicycle trailer hook for towing solutions. 2、Metal and Nylon Strap: Made of durable metal and nylon strap. 3、Compatible With: The hook adapter can be compatible with general bicycles and electric bicycles. 4、Quick Release: Run on quick release or flat axle wheels. Not suitable for disc brakes. 5、Easy Installation: With complete hook arm and hook connector, it can be easily installed without additional tools. Specification: Size: about 20x5x4cm/7.87*1.97*1.57in Material: steel, nylon Colour: black