This is a DSK Tactical Diamondback Version 2 with diamond plate/gear pattern handle. This knife shows no signs of wear and was kept in pristine condition by a very prominent collector. Dan Sullivan, USMC Vet and owner of DSK Tactical out of Arizona is a highlyÌ´Ì_sought after custom knife maker best known for his overbuilt ginormous tactical knives like the hugely popular Kickstand. Dan epitomizes quality and integrity, the same thing he instills into every one of his creations. He builds knives that withstand abuse and hard use in the field, not a shelf queen for your admiration. His newest release is a larger run of a model he developed last year called the Diamondback. The DSK Diamondback version 2 will be released first qtr of 2016. Several variations of the new DSK Tactical Diamondback folder will be coming out so look for options like PVD coating and others. If you want to be notified when they arrive click the "join waitlist" as supply will be very limited. All knives will ship with a Pelican 1030 waterproof micro hard case.