Jump box on both sides to increase the design of the handle slot, so you can easily move when you exercise. Jump box inside the cross thickened plate as support, can improve the strength and safety, so that you can better enjoy the process of exercise. The edge positions of the jump box are polished with high smoothness and rounded edges, so that you will not be scratched hands during the exercise. This weighted jump box is easy to assemble, non-slip, so you can move this exercise box anytime, anywhere, suitable for use in home gyms and commercial gyms. Stable and practical,it can meet your daily exercise needs. Benefits of plyometric box. With four sizes to choose from, you can purchase the most suitable size for your needs.