The Tesoro Button Lock knife is one of those rare and special pieces, a true treasure from our Custom Collection. It’s designed not just to be a tool, but a piece of history you can carry with you. The foundation is a strong yet incredibly lightweight 2.3 oz titanium handle, which houses a premium VG-10 steel blade, known for its exceptional sharpness and edge retention. But the true heart of this knife is its remarkable inlay, crafted from a genuine section of Woolly Mammoth tooth found in Siberia, a fossil from an animal that walked the earth over 15,000 years ago. Because this is a natural, ancient material, the colors and patterns on each knife are completely unique.