Dormer Pramet C273 18.0mm HSS-E-Powder Metal Flatted Shank Multi-Flute Long Series End Mill DIN 844 LThe Dormer Pramet C273 18. 0 mm HSSE Powder Metallurgical End Mill is a longseries, fourflute cutter designed for shoulder and slot milling in freemachining steels and copper alloys. With a 16 mm Weldon shank and extended reach, it delivers reliable performance for deep pockets and precise slots. Diameter: 18 mm Flutes: 4 Length of Cut (LOC): 63 mm Overall Length: 123 mm Reach with Neck Relief: 74. 5 mm DIN Standard: DIN 844 L Shank: 16 mm Weldon