Snap it on, snap it off and have all the fun in between with Blueline's C&B Gear Duo Cock and Ball Shaft Support. It's a mouthful of a name, but this double duty ring's function is super-simple! 

Circling the base of the shaft and balls together, two faux leather bands connect to a center strap. Once it's in place, the shaft rings constricts to keep erection firm, while the ball strap gently separates the scrotum from the body. The center strap keeps everything in place, which is something you'll definitely appreciate once things get heated. 

There are three possible snap positions per ring, so the Duo will easily fit most penises. The thicker base ring fits up to 2" (5cm) and the ball ring fits up to 2.5" (6.4cm).