Featuring a folding handle that protects the stone when not in use, its overall design is lightweight and ultra portable. You can also use the key chain swivel ring for your keys or to attach it to your zipper pull or backpack. A handy size for a variety of uses, the sharpening surface measures 2-11/16 In. x 15/16 In.. Overall, the Mini-Sharp is 1/4 In. thick x 1-1/8 In. wide x 6 In. long when open and 4 In. long when closed. This particular model also comes equipped with fine diamond (25 micron / 600 mesh) to hone a razor sharp edge. Thanks to its micronized monocrystalline diamond surface as well, you can sharpen edges faster and easier than conventional stones can. No messy oils are needed either, allowing you to sharpen dry or with water. Complete with a durable construction that will provide years of consistent performance and reliable service, professionals rely on the superior quality and versatility of DMT products for proper tool maintenance.