Pro-Tech Knives Dark Angel Awesome single action Out The Front automatic knife! Dark Angel Knives Sleek, Slender, and Fast! The Dark Angel delivers constant spring tension in an out the front auto knife in a very stylish and lightweight package. Slide Safety switch is located just above the push button. Slide AWAY from the button towards the front of the knife to take safety OFF / push the button and the blade comes straight out the front. To retract simply push the button and at the same time slide the charging bar back along the side. Dark Angel Spine