SOG Specialty Knives & Tools Tac AU-XR Automatic Folding Knife 3.50in D2 Tool Steel Partially Serrated Blade Black TiNi Black Anodized Aluminum Handle. The OTF represents a turning point in the evolution of tactical knives because now we have a knife that can be easily opened and closed with one hand be easily closed with one hand and have a tool that can easily be opened with one hand. We are proud to add this new shape to the SOG family and would like to introduce you to the newest member of the BlackFox family the -Tac. Taking design cues from the Vapor Trail a -Tac shares many of the same features as the Vapor Trail but with a black finish. We have streamlined the design to make it more compact so it carries more easily. The -Tac has a black FRN handle that is textured for better grip. We also added a black-coated backspacer and black-coated pins to make the -Tac more flashy. Specifications for SOG Specialty Knives & Tools Tac AU-XR 3.50in Automatic Folding Knives: Manufacturer: SOG Specialty Knives & Tools Blade Length: 3.4 in Overall Length: 8.03 in Blade Material: Stainless Steel Blade Shape: Tanto Weight: 3.5 lb Color: Black Closed Length: 4.59 in Package Contents: SOG Specialty Knives & Tools -tac Au - Black / Partially Serrated