The Kyocera External Grooving Toolholder 61NR08 is a toolholder designed for external grooving operations. It has a shank diameter of 0.625 inches and an overall length of 4 inches. The toolholder has a nominal groove width capacity of 0.078-0.197 inches and a grooving depth capacity of 0.039-0.118 inches. It is made of steel and is uncoated. The toolholder has an American National Standards Institute (ANSI) safety standard of B5.50, indicating it is made for turning and boring bars. Overall, the Kyocera 61NR08 is an external grooving toolholder well-suited for grooving, cutoff, and threading applications.