Fetish Fantasy Extreme The Prisoner Metal Cock CageCock Ring Diameter: 2. 5 inches Width: 1. 6 inches Insertable Length: 3 inches Dare your subject to get a hard on and watch as they struggle inside the prison like confines of the cage. No matter how aroused he gets, the curved steel shape prevents your sub from getting erect, but the open design still allows them the freedom to piss when they need to. You hold the key to pleasure, so make sure they do as you say before you grant them their freedom.