Lansky Sharpeners LDB6F: 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 two sizes and five 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 non-slip rubber frame.