This has been in the collection for about 6 years. Very light use with no signs of wear, original factory edge, never sharpened. From Manufacturer: The Brend/Pirela Mamba is an amazingly refined folding knife that combines the talents of noted knife designer Joel Pirela, the skills of master knifemaker Walter Brend, and Spyderco’s state-of-the-art production methods. Its gracefully upswept CPM S30V stainless steel blade not only faithfully replicates Brend’s legendary custom grind lines, it highlights them with a contrasting two-toned finish of black titanium carbonitride (TiCN) coating on the bevels and a satin finish on the flats. Special ball bearing washers in the pivot provide an extremely smooth action and allow lightning-fast openings with the blade’s integral flipper or its Trademark Round Hole™. The knife’s unique flipper design offers exceptional opening leverage and also serves as a rock-solid hand guard in the open position. An impressive fusion of style and ergonomics, the Brend/Pirela Mamba’s handle is built on a framework of thick, skeletonized titanium liners that also form the basis of its sturdy LinerLock mechanism. The liners are flanked by meticulously machined solid twill carbon fiber scales that are both visually stunning and provide a solid, comfortable grip. A contoured, custom-designed pocket clip completes the package, offering right-side, tip-up carry and guaranteeing immediate access.