Thread Milling Bit - 6mm (15/64") ShankThe Thread Milling Bit is a versatile and powerful CNC tool utilized in machining to create both internal and external screw threads in various materials. In order to create an accurate thread size, you must also ensure you select the appropriate size thread milling bit. Specifications: Shank Diameter: 6 mm (15 64") Total Length: ~ 50 mm Included Angle: 60 Material: Solid Carbide Materials: Wood, Plastics, Composite materials, Non Ferrous Metal, etc.