Description: M3\/M4\/M5\/M6\/M8 HSS Nitride Coated Screw Tap Metric Spiral Hand Thread Screw Tap Specification: Material HSS Surface treatment Nitrogen Treatment Thread Diameter 3mm, 4mm, 5mm, 6mm, 8mm Features: -Nitridation surface of the product, it's higher accuracy, and more durable. -Growth in the service life and cutting out the highest accuracy of the thread. -Spiral screw is suitable for cutting materials with high toughness, and is not suitable for cast iron scraps into fine materials. -Easy to drill the bottom. -Fine cutting and the chips will not stay. Note: Please note that the package includes one tap only. Package Included: 1 x Spiral Pointed Tap More Details: