Outer diameter: 0.7 inches (18.0 mm); Inner diameter: 0.5 inches (13.0 mm); Total length: 4.3 inches (110 mm); Shank diameter: 0.5 inches (12 mm); Blade number: 3 blades; 3 blades; Removable guide type; Right twist; Cutter outer diameter tolerance: 0 - +0.2; Inner diameter: e8; Material: SKH51; Country of origin: Japan