Lansky’s Diamond Benchstones are designed for expert knife and tool care. All Lansky Diamond Benchstones feature a full edge-to-edge diamond grit surface for quicker more efficient sharpening. They are available in two sizes and five grits.Lansky’s Diamond Benchstones feature a high-impact plastic self-storing case that raises the stone as shown to the left for maximum safety andfort. The basese with non-slip feet and an overmolded rubber frame.