Chain Ultra Plus CuffsForged aluminum frame Conical, flat contact bow Dual sided, single turn keyways Replaceable Lock Sets The original ASP Ultra Cuffs set a new standard in restraint design, technology, features and application. And Ultra Plus Cuffs raise the bar again, with the addition of a major new feature: keyless double locking. Double locking a critical step in ensuring both subject and officer safety is accomplished simply and instantly, simply by pressing the