DMT Coarse Diamond Stone features a folding handle that protects the stone when not in use, making it both lightweight and portable. It includes a convenient key chain that allows you to attach it to keys, a bag, or a zipper for easy access. This coarse diamond stone, with a grit of 45 micron/325 mesh, is designed to quickly restore a neglected edge. You can sharpen it dry or with water, depending on your preference. When opened, the stone measures 5-1/2 inches, and when closed, it is compact at 2-11/16" x 15/16" x 3/16". The package includes one stone and comes on a card for easy display. Model Number: F70C