This parachute ball stretcher is made of black leather, with a snap closure, and has small prickly little tacks lining the inside. The tacks are short, about 1/8" long, and will prick and scratch the skin like little thorns, but will not pierce the skin unless you squeeze or slap it very firmly. The parachute snaps around the balls, and a metal O-ring hangs below, connected by three chains. The ring is perfect to attach weights or a leash. This piece is very much not for the inexperienced or reckless. We advise the utmost caution.