These black steel ball weights are designed to make your cock and ball toys a little heavier. When used on ball stretchers (such as our Ball Stretcher Weight - LE340), you can give more tug to your testicles to help them hang lower. Simply attach them to a chain or ball weight and let them add more substance to your bondage gear. It is also possible to add them to products with D and O-rings to give them more weight and heft. Not only are they functional, but they look great too.