Description M3 M4 M5 M6 M8 HSS Nitride Coated Screw Tap Metric Spiral Hand Thread Screw TapSpecification MaterialHSSSurface treatmentNitrogen TreatmentThread Diameter3mm 4mm 5mm 6mm 8mm Features Nitridation surface of the product its 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 ironscraps 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