Steely Small Holy Trainer V4

Do you want to practice chastity? Well, doing so comes with a price. This full-metal cock cage will give you an idea of what it's like to dive into self-imposed celibacy. This cock prison is 1.73 inches long and 1.30 inches wide—suitable for starters. It is completely enclosed, except for the peehole at the tip. You can choose from the five available ring sizes and check which one fits best on you. Lastly, this cell has a discreet hinge lock that won't bulge underneath your pants.

There's no room for growth with this trainer. But you won't mind it a bit.