Four restraints connected by a single chain, amplifying the feeling of frustration. This set includes hand and ankle cuffs, interconnected by a single chain. Pulling one restraint causes the others to move, heightening the SM experience. Its one-touch locking system ensures safety and ease of use. This is a professional-grade handcuff and ankle cuff set produced by a major SM goods manufacturer, with each item handcrafted in Japan by skilled artisans. Maintenance is also very simple.