LINEAR AND LATERAL MOBILITYASP Chain Handcuffs provide a major advance in both the design and construction of wrist restraints. Frame geometry is the result of extensive computer modeling and simulation analysis. Strength potential has been maximized through use of an interlocking, unitized frame. The cuff structure is forged from high strength stainless steel on custom built, high speed, progressive dies. Each restraint is then over molded with ordnance grade polymer under 75 tons of pressure. The Lock Assembly is unitized and replaceable.CHAIN HANDCUFF SERIESASP Chain Handcuffs were designed in the field. Input came from officers and instructors in over 80 nations where ASP currently conducts training. As a result, this ASP design incorporates the practical features most requested by officers on the street. A stainless steel handcuff that weighs less than standard designs. Chain cuffs are flexible and more easily applied during a confrontation. A flat contact bow improves application. Complex keyhole up training procedures are no longer necessary. There is a keyway and double lock slot on each side of each restraint. A double lock warning bar is readily visible. Both double and single locks are released by turning the key in a single direction.The frame geometry, deep set teeth and precision smooth action eliminate the need for back-loading. Lock Assemblies are readily replaced.Handcuffs or key not included.Made in USA.