Easy to use, with processability Flute: 4 Cutter Diameter: 2mm, 3mm, 4mm, 5mm, 6mm, 8mm, 10mm, 12mm Shank Diameter: 6mm, 6mm, 6mm, 6mm, 6mm, 8mm, 10mm, 12mm Total Length: 51mm, 52mm, 55mm, 57mm, 57mm, 63mm, 72mm, 83mm