This heavy stainless steel ball-stretcher has two halves that hold together magnetically. The durable design has nearly a pound of weight to pull down on your balls. The powerful magnet makes this device easy to put on and take off. Just be careful to keep all your skin within the ring. Use it on your own or with a partner to test your limits. Measures 2.25 in. outer diameter 1.35 in. inner diameter.