Fetters Rigid Handcuffs + Leg Irons Combination

These hold ones wrists and ankles in line with each other. Typically from in front, though I have seen them used behind the back (only on very limber people!) One cannot move at all while wearing these not to mention the pain in the back, over time. Obviously intended as a torturous as well as restraining device.

They have a single "standard" allen wrench bolt lock.