Rapture Stainless Steel neck and Wrist Restraint with Spreader Bar. Heavy duty stainless steel neck and wrist bondage set. The collar and cuffs all connect by a spreader bar and connecting links. All the parts are detachable and can be used separately. The cuffs and collar are locked by an integrated flush mount common allen key. 4 Piece bondage set. Detachable wrist cuff, collar and spreader bar. Heavy Polished Stainless Steel. Integrated allen key screw locks. Collar inside diameter is 5.5 inches (14cm). Cuff inside diameter is 2.33 inches (6cm). The spreader bar length 14.25 inches (36cm). Weight: 4.6lb (2.1kg).