The Mercer Culinary M15955 Flattening Stone is an essential tool for maintaining the flatness and peak performance of your sharpening stones. It features a 360-grit diamond plate surface housed in durable ABS plastic, making it both effective and long-lasting. This compact flattening stone is ideal for restoring your sharpening stones to a like-new condition, ensuring that your blades can be honed to their sharpest edge. Measuring 2-3/4" by 3/4" by 3/4", its small size enhances portability and ease of storage, making it a convenient accessory for any professional kitchen or home use. The stone's coarse grit efficiently levels and smooths the surfaces of your sharpening stones, which is crucial for achieving the best sharpening results. Overall, the Mercer Culinary M15955 is a practical choice for anyone looking to extend the life and functionality of their knife sharpening equipment.