[Combined with Steel Plates]: The weighted wrist and ankle bands are designed with pocket for putting steel plates(not included); Suitable for steel plates in length of 15cm and width of 2.5cm. [Fitness Partner]: You can use it as ankle weights or wrist weights; Add more to daily workout, walking, jogging, core training, fitness, aerobics, gym and many other exercises, helping increase strength, rehabilitate muscles, improve balance, and assist physical therapy.