Abstract: A double locking handcuff includes an interior spring laterally moveable between single- and double-lock positions. A finger-operated, pivoting cam is disposed within a slot extending through the cuff frame, and has a wide upper end accessible from the top of the cuff and a narrow, leg-like lower end positioned for movement against the spring. For double locking the handcuff, the cam upper end is moved downwards by hand. This causes the cam leg to press against and laterally shift the spring to its double-lock position. Because the cam is movable by hand and without the need for the handcuff key or for finding a double lock slot or pinhole, the double lock mechanism can be easily and quickly actuated. Also, when the handcuff is double locked the cam can be freely pivoted back and forth, providing direct tactile feedback that the handcuff is double locked.