Color: black + silverMaterial: Tungsten Carbide Coated,3 times Durable than Carbide6pcs 1mm 2mm 3mm 4mm 6mm 8mm diameter 4 Flute End Mill Cutter CNC Bits\/set,Easier roughing and finishing processingU-shaped bottomgroove design, large front angle effectively reduces cutting resistance, sharp and durable, convenient for chip removal, further improve machining efficiencyEnd mill bits are suitable for side milling, end milling, finish machiningApply to Hardness of metal ,carbon steel, alloy steel, die steel, tool steel, cast iron, titanium, aluminum, etcPackage Contents:6 * End MillsOnly the above package content, other products are not included.Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +\/- 1-3cm.