The magnet weighs 9oz. The integration of the magnet to the box is the most important part of the system. This is a universal stabilizer mount that secures the magnet to the bow, and a set screw ensures that the magnet cannot rotate along the stabilizer. The quick release creates a rock solid foundation for the magnet, and the quick release allows the magnet to be completely removed if needed. This versatility grants the hunter confidence that the bow is secured on the back without the bow swinging around, which conserve the most amount of your energy.