Designed for outdoor users, The Aegis AT pocket knife features rapid assisted opening using SOG\u2019s innovative ambidextrous AT-XR Lock with an ergonomic handle and grip pattern for comfortable use. Aegis AT is an easy to carry folding knife, with a highly functional 3.1\" cryogenically heat-treated D2 steel blade. Its powerful XR locking mechanism also features solid built-in blade locking safety and spine-mounted safety system. The next evolution of the legendary Aegis assisted opening knife.