Rapture Heavy Polished Stainless Steel Collar. Keep your submissive in-line and in your control with this Thick Stainless Steel Locking Collar. The durable and heavy steel will remain firmly around your submissive's neck, keeping them in place and on a leash if you prefer. The collar opens and locks with a stainless steel allen screw, an allen key is supplied. The collar has one O-rings for attachment to leashes, chains, ties or other bondage gear. Attach a leash to the collar and lead your sub around making them follow all of your commands. The inside diameter is 5.5 inches (14 cm), the Collar Height is 1 inch (2.5 cm), the thickness is 0.2 or 1/5 Inches (0.5 cm). The circumference is 17 inches (43 cm). Solid Stainless Steel with polished Finish, Attached lead ring, Flush mount allen key screw lock, Made from heavy weight 0.2 or 1/5 Inch (0.5 cm) thick stainless steel. Circumference is 17 inches (43 cm), The inside diameter is 5.5 inches (14 cm) and the Collar Height is 1 inch (2.5 cm).