Lock, cock, and bare all! The Metal Cock Ring with Locking Ball Strap is a beautiful device to keep your sub in line. This CBT tool causes longer, stronger, and harder erections by restricting blood flow using a metal O-Ring as a cock ring and locks via padlock and key. Using a leather strap and grommets for that classic BDSM aesthetic, this contraption ensures that a captive cock makes for an obedient submissive.