The SOG Trident folders have features that are common to several of SOG's most popular knives. Upon closer inspection, you will find that they have features not normally seen in a folder. The Trident uses S.A.T. technology to open the knife, just open the knife about 1/3 of the way and the knife does the rest. There is also a built-in safety to lock the blade in the closed position, when it shows red the knife is ready to be deployed. Overall length 8-1/2". Weighs 3.5 oz.