5/16" 4" Flute Solid Carbide Single End Mill Bits for Aluminum are for sale at Wholesale Pricing from Bisco Tool! Endmills are perfect for high production milling. Solid Carbide End Mill Bits for Aluminum and non-ferrous metals offer extreme resistance to abrasion and thermal deformation. Solid Carbide End Mills have flute length and overall length. Call Bisco Tool Supply 866-247-2635 with any questions on Carbide End Mills.