The Monadnock Ultimate Hinge Handcuffs are built tough, ensuring that even the least cooperative prisoners stay put. The heavy-duty construction and oversized rivets make them extremely strong, and their leaf spring double lock is virtually impossible to defeat. Their three six-toothed retaining bars make picking attempts futile and include a built-in backloading system for quicker application. They also feature True Swing Technology, which ensures that the shackle lands dead-center every time, making them quick to put on. The hinge allows them to be stored folded, but snaps open quickly for rapid use.