Go for complete surrender with this metal collar from the Sinner Gear collection. Do you and your partner love to play exciting games? Then some BDSM toys are indispensable! The tough set is made of strong, durable and cold metal. The collar can only be opened by using the included Allen key. The wearer cannot take the collar off and is completely dependent on the partner. Attached to the collar is a set of nipple clamps with chains.