The Portable Bicycle Trailer Hitch Coupler is a set of 2 carbon steel hitch couplers designed for easy attachment to the rear axle of a bicycle. With a universal fitment and portable installation type, these couplers are lightweight at about 150g each, making them convenient for carrying on the go. The durable construction ensures a secure attachment while riding, allowing for quick and easy transportation of a trailer or other accessories. Perfect for cycling enthusiasts looking to enhance their biking experience with added versatility and functionality.