In order to improve your grappling game, you need to practice regularly. You are not always going to have a training partner to practice your skills. But products like the Combat X Trainer can help you work on your game on your own. It has full length limbs and lifelike joints to enable you to drill submissions.
The Combat X Trainer features a 65cm spherical body and five projections to simulate a head, arms, and legs. Use it to drill guard passes, positional controls, and dynamic transitions. The Combat X Trainer is designed to withstand up to 1000 lbs of pressure. Sets you back $179.