Crown Revolution Cryo Bowl Gouge Blade, 3/8 in. Bowl gouges are the essential tool for general turning and shaping of bowls, platters, and other vessels. This Crown 3/8" high speed steel blade a unique advantage with its cryogenic treatment, a technology that has d tool performance by enhancing durability and edge retention. ly used in plane blades, cryo treating involves super-cooling the cutting tools to alter the crystalline molecular structure of the metal, resulting in significantly improved wear resistance and a superior feel during use. Designed specifically for Crown's Revolution Turning System handles, this gouge blade can also be used with similar systems. It is sized by the European method, measuring 3/8" wide at the flute with a 1/2" shank and an overall length of approximately 12". Made in England. Model Number: REV241KW