This collar can be worn as jewelry or as a piece of bondage for fetish play. It is made of polished stainless steel. The finish is exquisitely polished. It made from solid 0.5-in. diameter stainless steel. The collar is fitted with a sunken screw lock and conforming hinge that gives it a seamless flush appearance. The 4.75 in. diameter is designed for a loose fit that is not restrictive but also makes the wearer aware it is on due to its heavy feel. The neck circumference is 15.5 in. Weight is 14 oz.