Stainless steel glans ring (latch fastening)

A metal ring that sits in the groove behind the glans. The material is stainless steel 304 and the color is silver. Depending on the size it weighs between 10g and 12g, and each ring comes packed in its own box.

Four sizes and how to choose

There are four steps: S at 24-26mm and 10g, M at 26-29mm and 11g, L at 27-30mm and 11g, and XL at 29-32mm and 12g. The supplier advises choosing by the circumference behind the glans. Unlike silicone, a metal ring does not stretch, so the wrong size either will not go on at all or slips off.

Built with a locking latch

You hook the open ring into position and then close the latch to secure it. There is no need to slide it on from the tip the way you would with a solid ring, and once fastened it will not work its way off by itself. Removing it is just a matter of releasing the latch, so there is less panic about being unable to get it off.

Warm it and use lubricant

Metal is cold and does not grip the skin. The supplier advises warming the ring in warm water, then applying lubricant before putting it on. Skip those two steps and cold metal drags on the skin as it goes on, which hurts. Being metal rather than silicone, it works with any type of lubricant, but a water-based one washes off most easily.

Before you use it

This is a device that constricts and slows blood flow, so it must not be worn for long. The supplier also states that you should not fit it too tightly or leave it on too long. Do not use it on broken skin, and release the latch and remove it as soon as you feel pain or numbness. Once the tissue swells, a metal ring becomes far harder to take off. Ondobox ships it in plain outer packaging with no product name on the label. Shipping is free nationwide and you pay cash on delivery.