The FUBAR Sharp Stone is a traditional sharpening tool handmade by the primitive craftsmen and blacksmiths at Reptile Toolworks in Kentucky. Each ceramic sharp stone is made from the same clay used to make durable stoneware products. The radii and edges of the sharp stone are designed to let you to touch up the microbevel on both straight and serrated cutting tools. Keeping that edge honed means you practically never have to actually sharpen your blade! The sharp stone's back surface features grooves for sharpening needles and fishhooks, making it a valuable camping accessory. It can be worn as a necklace with the included cords or stored in the plastic box it arrives in.