Single Action Out the FRONT Knife – Sleek, Lightweight, Fast and Double Edged – The Dark Angel is an elegant single action out the front automatic knife with a 3.75” blade. The Dark Angel uses a constant tension compression spring – so the auto out action is smooth and uninterrupted. To re-set the knife, push the button to unlock and pull back on the convenient charing bar. Slide safety switch, deep carry pocket clip, and nylon sheath are included on every Dark Angel.