The Kingpin Stainless Steel Glans Ring by Master Series is equal parts functional pleasure device and aesthetic accessory, providing an alluring look and new, exciting sensation for the wearer and their partner. Designed to be worn around the corona (the ridge just below the head of the penis), the ring is open, allowing some flexibility and adjustment in size, and sports an engraved design of whorls and curled ends at the opening.

Like a ring worn at the base of the penis, the Kingpin restricts blood flow, making the head of the penis harder and more sensitive, and providing a unique feeling of snug pressure on the corona for the wearer. Worn during lovemaking, the ring can also provide new sensation for the wearer's partner (though it is not recommended that this ring be worn during anal intercourse to avoid the risk of it getting lost).

This ring has a 30 millimetre internal diameter. It is also available in 24 millimetres. It can be safely paired with any type of lubricant, and cleaned or sterilized easily. While the ring is somewhat flexible, excessive bending should be avoided to prevent weakening of the metal over time.