It is a good toy when you want to punish your partner by preventing erection, stimulation or penetration.
The way to use it is very simple, you just have to place the metal ring behind the testicles and insert the penis in a relaxed state into the sheath. Then you close the whole set with its padlock and you already have the submissive under control.
The diameter of the ball ring have 3 Size:
40 mm/1.6 inch (S)
45 mm/1.8 inch (M)
50 mm/2.0 inch (L)