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 screw, a screw driver 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 subaround 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).