Introducing a classic, the Leather Knocker Collar with Leash. This genuine leather collar features a central metal O-ring, perfect for attaching all sorts of bondage equipment including gags, harnesses, rope and of course, leashes. The 18-inch leash on this product is detachable via a clip, meaning that you can switch things up depending what mood you're in. This adjustable buckle collar can be altered to comfortably fit your size within the size range 33cm-46cm.