DMT Mini-Sharp Sharpening Stone features a folding handle that protects the stone when not in use, making it both convenient and durable. This lightweight and portable sharpening tool includes a handy key chain, allowing you to easily attach it to your keys, bag, or zipper for quick access. The stone is made with fine diamond grit, measuring 25 micron/600 mesh, designed to deliver a razor-sharp edge. It can be used dry or with water, providing versatile sharpening options. When opened, it measures 5-1/2 inches, and when closed, it is compact at 2-11/16 inches by 15/16 inch by 3/16 inch, making it for on-the-go sharpening needs. Model Number: F70F