Aegis (ee-jis), which in Greek means shield or protection, is also the code name for the world's premier integrated air defense system and the sea-based element of the United States Ballistic Missile Defense System.

SOG's comprehensive Aegis line of premier folders is fully integrated with top end systems. Take the modified arc actuated piston locks that enable and support several blade configurations. Start to open the knife, and let Aegis finish the action with a bang, using one of the surest assisted technologies (S.A.T.) out there! SOG's trademark bayonet reversible clip, built in safety with red/ready to go, checkered DigiGrip handles, and tacky rubber inserts all contribute to make Aegis a platform for today's changing world. Cover your back with Aegis outdoor or tactical blades.

SOG Assisted Technology works through the balance of opposing high-tension coil springs. As one opens the blade the force to propel the knife open becomes greater than the closing force and the blade will open on its own. The end result propels the blade out once the operator has initiated the one-handed opening action.