About this product: This product is a practical bicycle trailer device for traction. Using durable steel and nylon band structure, strong and durable. Application to quick release or shaft wheel nut. not apply to disc brake. With full hook arm and hook joint hooking, it is easy to install without any other tools. The mounting device can be compatible with universal bicycle and electric bicycle. Product Description: This product is a practical bicycle trailer device for pulling. hooking makes it easy to install without any other tools.High quality steel ensures high durability and applicability.Mounting device can be compatible with universal bike and electric bike.Application to quick release or shaft wheel nut. not apply to disc brake. Features: - Color: As shown in figure. - Materials: plastic and copper. - Size: approx. 20 cm (length) .- This product is a practical trailer device for pulling. - The use of steel and durable nylon strips, strong and durable. - Be equipped with ;a