Yoshihiro Sharpening Stone Fixer & Nagura Conditoning Stone Chef's Tools Set (6&rdquo;L x 2&rdquo;W x 1&rdquo;H) Stone Fixer and Nagura Conditioning Stone are the 2 most essential accessories necessary to maintain the quality of a whetstone. Flatten the surface of your whetstone with a Stone Fixer in order to correctly sharpen the blade with an even edge. Create an optimal sharpening surface on your polishing stone with a Nagura Conditioning Stone. Size: Stone Fixer (6L x 2W x 1H) / Nagura Conditioning Stone (2.9L x 1.57W x 1.1H) Country of Origin: Made in Japan