Correction Stone A correction stone is a whetstone used to flatten the surface of whetstones used for sharpening blades. Maintaining whetstones is very important to maintain the effectiveness and lifespan of the whetstones themselves. First, it is important to clean the surface of the whetstone before and after use to remove any remaining metal powder or abrasive grains. ◎ Flattening ◎ The surface of a whetstone can become uneven with use. This makes it difficult to sharpen blades correctly. Therefore, by using a correction stone and regularly flattening the whetstone, the surface can be kept even. ① Soak in water for 5 to 10 minutes before use. ② Rub the stone back and forth, making sure the diagonal groove part makes contact, until the whetstone surface is flat. ③ Once flat, rinse with water and dry. 【Product Details】 Size: 180mm x 60mm x 25mm Weight: 550g Material: Black silicon carbide 【Notes】 ■ This product is imported. Please note that this is not a King whetstone. ■ There may be imperfections in the details, as well as some scratches or dirt that may occur during the manufacturing process. ■ We inspect the products before shipping, but if there is an initial defect, please contact us via message before leaving a review. Please note that we cannot respond after a review has been submitted.