Spydercos Centofante-4 folder represents the evolutionary refinement of previous Centofante/Spyderco collaborations. Its thin-profiled fiberglass reinforced nylon (FRN) handle is furrowed with grip enhancing channels and inset with a Palladium silver Spyderco logo bug. Adding security and ease of deployment, the back-lock is positioned mid-spine. Cut out of the locking lever is a David Boye Dent, diminishing the feasibility of gripping the knife handle tightly enough while cutting to unintentionally release the lock. The Centofante4 features a Wharncliffe VG-10 steel blade that has both a hollow-grind and a non-sharpened spine swedge-grind. Prominently rising above the Spyderco Round Hole is a crest for the thumb keeping it in controlled contact with the blade. Right-hand steel pocket clip positions the folder for tip-up/tip-down carry. Nested steel liner in the handle creates rigidity and a foundation for the clips screw attachment.