The Spyderco Endura 4 Folding Knife shook things up by being the first of its kind on the market. The Endura 4 opened up the knife market to lightweight performance, one-handed open pocket knives that just about everyone could afford. During the Endura 4's CQI journey, Spyderco tweaked the ergonomics, refinded the blade steels and fine-tuned the performance to give you the knife that you need and in which you would WANT to carry around all day. Spyderco's VG-10 steel blades are flat saber-ground with a stuper durable blade tip. The bronze washers make this knife buttery smooth to open and thanks to it's redefined blade spine, this blade will give you the support that you need without having to worry about jimping.