Shank Diameter: (5/8" inch / 16*16mm) ; Overall Length:( 6.3" inch / 160mm)
Grooving holder : Each tool holder is black oxidized smooth surface and tool hardness (HRC 48 degrees up and down) and precision are up to the first grade.
Insert : Turning inserts exquisite workmanship, high strength, high toughness, stable and durable.