Much stronger, smoother, easier to use. Locks and unlocks very smoothly.Extremely durable with an exceptionally smooth and comfort.Open cage chastity designs are made of a strong, lightweight plastic to keep the device rigid and unbreakable. It is essential to maintain a balance between abstinence and comfort. A misfit arc or ring size can cause several complications making it inconvenient for first-timers. Overdoing abstinence can cause a decreased level of dopamine in the user's brain. It is where a 3D Male Chastity Cage comes into play. It has four options for arc rings, varying in size from 4.3CM to 5.1 CM. Package 100% discreet. 4 Rings Kits:Include 4 arc rings(43mm,46mm,49mm,51mm)+1cage+1 pair key5 Rings Kits:Include 5 arc rings43mm,46mm,49mm,55mm)+1cage+1 pair key+Disposable Plastic Chastity Locks [Nano] Cage Length: 65mm (2.56 inches tube)