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This Buckling collar has adjustable nipple clamps attached to a strong nickel plated D-ring for ease of accessibility and control.The buckling collar is widely adjustable so it will fit most neck sizes. The nipple clamps are attached by two 300mm (12 inch) chains, are adjustable and have plastic-tipped ends for a non-slip grip (we wouldn't want our slave to escape the punishment). If you only want to use the collar then the nipple clamps can be removed because they are attached to the collar by a key-chain style fastener. This collar allows you to use a good set of nipple clamps without the chain getting in the way, excellent :). It also puts the chains in a good position for leading your subject along.