Feature: 1. Cobalt-containing 5% flute has high strength and cobalt-containing high-speed steel can significantly improve the wear resistance and cutting performance of steel. 2. Wide range of application, screw tap is durable and wear resistance, which keeps high cost performance and practicality. 3. Spiral tap can process stainless steel and other difficult-to-machine metals, practicality. 4. Pat the debris into a spiral shape to discharge the chips upwards, which is more suitable for processing into blind holes and viscous material processing. 5. And such hand tool is suitable for processing stainless steel, steel plate, copper, MK80 alloy steel, die steel, iron alloy and other metals. Specification: Item Type: Screw tap Material: High speed steel Color: Gold and Silver Size: Tap M5 Flute Diameter: Approx. 5mm / 0.2in, Flute Length: Approx. 20mm / 0.79in, Shank Diameter: Approx. 4mm / 0.16in, Total Length: Approx. 67mm / 2.64in Tap M6 Flute Diameter: Approx. 6mm / 0.24in, Flute Length: Approx. 22mm / 0.87in, Shank Diameter: Approx. 6mm / 0.24in, Total Length: Approx. 66mm / 2.6in Applicable: Suitable for processing stainless steel, steel plate, copper, MK80 alloy steel, die steel, iron alloy and other metals. . Package List: 1 x Screw Tap M51 x Screw Tap M6 Note: Due to manual measurement, please allow 1-3mm error. Thank you for your understanding.