Hiatt Black handcuffs feature oversized rivets for increased strength. Black handcuffs are good for tactical situations where you do not want a reflection giving up your location. These handcuffs feature Hiatts signature 3 pawl retaining bar system and built in backloading feature. The triple pawl design makes these handcuffs extremely hard to shim. Backloading allows you to preload your handcuffs without having to swing them through. These are manufactured in the USA by Safariland and come with 2 keys and lifetime warranty. As for any blued black handcuffs we recommend regular cleaning with high quality gun oil to protect the finish.