This is the early model TF-5. Might meets right could pretty accurately describe the Trident family of knives. They embody the spirit of elite special forces throughout the world. With so many unique features, these knives function as a personal arsenal to help conquer chores from the extreme to the every day. The Trident series uses our well-proven means of delivering a knife blade to the open position with SAT (SOG Assisted Technology). Using our patent pending Arc-Actuator, the Trident locks stronger and releases easier than ever before. There is also a built-in safety to lock the blade closed, when it shows red, you are ready to go! What also makes the Trident so unique is the Groove in the handle, which allows the operator to cut paracord, fishing line, etcetera without having to open the blade. The handle also features our trademark variable Digi-Grip pattern for coarser grip in areas that require it. Finally, the bayonet style clip is easily switched for right/left hand carry or removed for pouch storage.