- Heavy duty platform speed ball swivel provides a great training aid for MMA, Boxing, Martial arts and much more. The wooden platform can be held onto a wall by using the metal bracket provided in the set. Speed balls provide great fun at home or the gym for boxers to develop a hand-eye coordination and quick feet movement. Anyone training for boxing, kick boxing, MMA and etc will need to learn to keep their hands up and shift weight between feet when punching. Speed balls are great for hand speed work and agility, improving balance and giving a rhythm to the fighter.