Buck Knives and TOPS Knives have collaborated to provide the Model TBT-101 liner-lock folder. The TOPS-designed blade is a 3.5-inch modified Tanto blade, made of 0.175-inch thick, high-grade ATS 34 stainless steel. The blades are heat-treated and finished with Buck's advanced Edge2x technology that makes the blade sharper out of the box, hold an edge longer, and easier to re-sharpen.