Lansky Diamond Bench Stone - Restore a Razor Edge in Minutes Lansky&';s Diamond Bench Stones are designed for expert knife sharpening and woodworking tool care. All Lansky Diamond Bench Stones feature a full edge-to-edge diamond grit surface for quicker, more efficient sharpening. They are available in three grits. Lansky&';s Diamond Bench Stones feature a high-impact plastic self-storing case that raises the stone as shown to the left for maximum safety and comfort. The base comes with a non-slip rubber frame. Type: Bench Sharpener