Best used for: Standard milling, dadoing, and boring. Cutting Diameter: 3/8" Cutting Height: 1-1/4" Shank Diameter: 3/8" Overall Length: 2-1/2" Flutes: 3 Up-cut end mills direct woodchips up and away from the milling area leaving an unobstructed path for the end mill. Bit breakage is less likely. Up cut end mills are the best choice for most standard milling applications. The up cut direction can leave behind a minimally rough top surface edge.