Cutter Type Diamond File Diamonds are firmly electrodeposited, and the sharp cutting edge lasts until the end. Grit: #400 Besdia Diamond Cutter File BF Cutter Type Diamond File ・This file has diamonds electrodeposited on it. ・Diamonds are firmly electrodeposited, and the sharp cutting edge lasts until the end. [Applications] ・Suitable for grinding and correcting fine details such as the bottom and groove corners of molds.