Overview: If you operate or maintain CNC machinery, make sure you have spare carbide milling cutters handy with this brand new box of 22mm twin spiral flute replacements. Specification: Type: twin spiral flute carbide cutters Total length: 40mm (1.6") Cutting edge length: 22mm (1/8") Cutting edge diameter: 3.175mm (1.6") Shank diameter: 3.175mm