4 pc set includes: 4 velvet-like, 1? wide soft nylon restraint cuffs with built-in 48 nylon tie straps. Each cuff is so adjustable that it will fit wrists or ankles up to 10, and lock securely with VELCRO?. Versatility: our cuffs, with built-in nylon tie straps, can be used wherever your fantasies lead you. Tie them together or tie them apart, to a bed frame, a chair, a closed door or attachment points on the wall. The non-metal D-rings also provide strong attachment points to fasten the cuffs together or to other equipment (and saves embarrassment when going through security metal detectors). While it might be possible to work out of the cuffs, it will be a challenge. These restraints are more secure than you might expect from a soft VELCRO? cuff