This door speed bag for boxing is a sleek, fitness-boosting piece of equipment. Use it to enhance your upper body strength, quick reflexes, accuracy, coordination, and endurance. The wall-mounted system allows height adjustment, so with a training buddy or in shoes that lift you higher, the ball can adapt to fine-tunable perfection. This boxing training equipment makes a great performance tool for MMA, martial arts, and more. Use it to get in shape with amateur or professional practice.Features - Adjustable height offers freedom to raise and lower the ball with an easy twist knob Wall-mounted design, helpful to save space Performance tool to train your hand-eye coordination, quick reflexes, accuracy, muscular strength, and stamina Extra durable and wear-resistant PVC material around ball, better than PU leather Heavy-duty steel mounting platform with durable powder-coated surface that retains nice quality, complete with glossy finish Bracket ensures stability Training aid for MMA, boxi