Dormer Pramet C9220.0mm HSS-E-Powder Metal Alcrona Primax Flatted Shank Multi-Flute Long Series End Mill DIN 844 LThe Dormer Pramet C9220 20 mm end mill is a long series, 4 flute tool built for shoulder and slot milling in a wide range of metals. With a durable HSS E substrate and Alcrona Primax coating, it delivers reliable performance in deep pockets and demanding milling tasks. Diameter: 20 mm Flute count: 4 flute design for efficient cutting and chip evacuation Length of cut: 75 mm Overall length: 141 mm Reach with neck relief: 90. 5 mm Shank: Weldon 20 mm