Our round, curved diamond riffler has a 6" overall length, and the coated ends measure 1" long. Grit is medium, 150 grit, made from 100% man-made diamonds. These synthetic diamonds are more consistent in shape than natural diamonds which guarantees sharp and even cutting action, durability and long life. All blanks are precision-made of high-strength steel. High-density wear-resistant plating enables total usage of the full concentration of diamond crystals.  Ideal for filing hardened metals, including steel and carbide, as well as ceramics and hard plastics. Made in Taiwan.