The SOG Aegis Tactical Folding Knife features a 3-1/2" AUS 8 stainless steel blade, GRN Polymer handle, and assisted opening blade. 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. Aegis is also equiped with SOG's trademarked bayonet reversible clip, built in safety with red/ready to go, checkered handles, with tacky rubber inserts.