When sharpening your tools, this combo stone will help streamline the process. Made of aluminum oxide, the stone has a fine 320 grit on side, and a coarse 120 grit on the other. The soft Arkansas side will bring your edge to basic sharpness and polish. The hard black Arkansas side will finish your edge to a smooth, ultra sharp to-the-touch finish. This bench stone is perfect for maintaining a sharp and durable blade edge on any of your tools. Order today at Stuller.com/tools.