KA-Bar USSF Corser Folder 5698SF. The 5698SF USSF Corser Folder has a tanto blade shape and reversible pocket clip. The lockback knife has a blue GFN-PA66 hard plastic handle and an AUS 8A stainless steel blade that is coated in grey powder coating. The Corser is 7.875” overall when open and has a 3.5” blade. Lockback style. Overall length: 7.875". Blade length: 3.5". Blade Width: 0.875". Bulk weight: 0.2 lb. Grind: Flat. HRC: 56-58. Features Tanto blade shape, lockback, and reversible pocket clip.