Speed Bag Platform, Wall Mounted Speedball for Boxing, MMA Workout Punching Bag Height Adjustable for Home GymADJUSTABLE HEIGHT: Vary the height of this boxing speed bag whenever it needs alteration. Whether you're sharing with someone of a different height or just wearing different shoes, the adaptability of the twist knob operation lets changes come smoothly and easily. Never commit when adjustability is an option you can take in your palm. SPACE SAVING MOUNT: With minimalist spacing in mind, the wall set up of this speedbag allow room for other ways to