Solid Carbide End Mill 2mm 2R0.5x2.5-25x75xD3D1 (Cutting diameter): 2mm D3 (Undercut diameter): 1. 8 mm L2 ( Length of cut): 2. 5mm L3 (Length of undercut): 25mm L1 (Total length): 75mm D2 (Shank diameter): 3mm Z (Number of cutting edges): 4 R Corner radius: 0. 5 Helical pitch: 30 Unequal tooth pitch and variable helical pitch for smooth running Specially designed cutting edge geometry for contour machining Optimized chip chambers for safe evacuation of the chips Radius tolerance r 1. 5 mm: 0.