Out The Front Automatic Knives are a great addition to any knife collection. These Out The Front Automatic Knives come in single action or double action. Single Action Fire By The Button But Need Manual Retraction. Double Action, which is sometimes referred to as Dual Action OTFs, Fire Open & Close By The Button. See more products at: http://www.myswitchblade.com/Out-The-Fronts-OTFs-Switchblade-knives-s/39.htm