Dormer Pramet C822 28.5mm x 8.mm HSS-E Screwed Shank Woodruff Cutter DIN 850Premium Woodruff cutter designed for precise keyway milling in steel, stainless steel, cast iron, and non ferrous metals. The Dormer Pramet C822 delivers durable, reliable performance for machinists and shops that require accurate, repeatable keyway slots. Diameter: 28. 5 mm Width of cut: 8 mm Overall length: 63 mm Teeth: 12 tooth configuration DIN standard: DIN 850 Shank: 10 mm combi shank with Weldon flat and thread Material and finish: cobalt based