Smith & Wesson Model 1 universal handcuffs fitted by BOA Handcuff Company with their Cuff-Maxx ASSA Desmo high security lock cylinders. These handcuffs have a larger opening and close smaller than standard cuffs. BOA uses highly pick resistant locks and has a restricted key control system to prevent unauthorized key duplication. Each pair is uniquely keyed and duplicate keys are available only to registered users upon signature verification. Multiple sets can be ordered with two different key options. The locks on each set can all be keyed alike or each set can be keyed different. Medeco lock cylinders available upon request.