Solid Carbide End Mill 4mm 4x13-18x57xD6D1 (Cutting diameter): 4mm D3 (Undercut diameter): 3. 7mm L2 ( Length of cut): 13mm L3 (Length of undercut): 18mm L1 (Total length): 57mm D2 (Shank diameter): 6mm Z (Number of cutting edges): 2 Helical pitch: 38 Defined clearance angle for ideal stabilization with high cutting depths Special helical pitch for smooth running and soft cut Extra large chip chambers for an extreme chip volume For use in high speed milling machines For roughing and