Designed for outdoor users, Aegis AT Tanto is an assisted opening knife that features SOG's innovative ambidextrous AT-XR Lock with an ergonomic handle and grip pattern for comfortable use. Aegis AT is a pocket knife that is easy to carry, with a highly functional 3.1" cryogenically heat-treated D2 steel blade. A versatile high-carbon tool steel that is cryogenically heat-treated to SOG's unique performance specifications. D2 provides the ideal combination of edge retention and durability for long term use with ease of maintenance. Its powerful XR locking mechanism also features solid build-in blade locking safety and spine=mounted safety system. The next evolution of the legendary Aegis folding knife.