About This Compact & Portable – This credit card-sized diamond sharpening stone fits easily in your wallet, pocket, or backpack, making it a convenient tool for on-the-go sharpening. Coarse 325 Grit – With a coarse 325 grit (45 micron), this sharpener quickly restores dull edges and sharpens knives, tools, and other blades, making it perfect for outdoor enthusiasts and DIY projects. Durable Monocrystalline Diamond Surface – Featuring a high-quality monocrystalline diamond abrasive, this sharpener offers long-lasting performance and effectively sharpens blades, ensuring precision and durability. Versatile Use – Ideal for a wide range of items such as pocket knives, kitchen knives, scissors, and other cutting tools. This portable sharpener is versatile for both everyday and emergency use. Dry Sharpening, No Water or Oil Required – Designed for dry sharpening, this tool works effectively without the need for water or oil, making it a hassle-free solution for quick and efficient sharpening on the go. Overview Material : Diamond Coated,Monocrystalline Diamond Brand : SHARPAL Color : Gray Product Dimensions : 3.27"L x 2.13"W x 0.14"H Item Weight : 63 Grams Grit Type : Coarse Number of Items : 1 Manufacturer : Sharpal Inc. UPC : 814744028004