SOG Specialty Knives & Tools Aegis At - Rescue Red + Indigo . Aegis AT is a pocket knife that is easy to carry with a highly functional 3.1in 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 folding knife. Specifications for SOG Specialty Knives & Tools Aegis AT Folding Knives: Manufacturer: SOG Specialty Knives & Tools Blade Length: 3.1 in Closed Length: 5 in Blade Material: D2 Steel Serrated: Straight Edge Knife Application: Folding Blade Overall Length: 8.1 in Blade Shape: Tanto Handle Material: GRN Handle Finish: Titanium Nitride Blade Finish: Titanium Nitride Blade Thickness: 0.12 in Lock Type: AT-XR Sheath Material: No Sheath Weight: 4.4 oz Opening Method: Thumb Stub Package Type: Box Quantity: 1 Blade Type: Fine Features of SOG Specialty Knives & Tools Aegis AT Folding Knives AT-XR Lock provides the ultimate built-in blade locking security when open and ensures it only opens when intended A versatile high-carbon tool steel that is cryogenically heat-treated to SOGs unique performance specifications D2 provides the ideal combination of edge retention and durability for long term use with ease of maintenance Package Contents: SOG Specialty Knives & Tools Aegis AT Folding Knives SOG Specialty Knives & Tools SOG-11-41-14-41: Aegis AT Folding Knives Indigo/Acid SOG Specialty Knives & Tools SOG-11-41-09-41: Aegis AT Folding Knives Black/Moss SOG Specialty Knives & Tools SOG-11-41-08-41: Aegis AT Folding Knives Rescue Red/Indigo SOG Specialty Knives & Tools SOG-11-41-13-41: Aegis AT Folding Knives Forest