Made of high-quality Material, with high hardness, wear resistance, long service life and durability.Suitable for fasteners and fastener holes, cutting or updating internal and external threads.All-grounded and high-precision faucet is very sharp for tapping and chip removal, running smoothly and efficiently.Tapered teeth design began to thread more easily and smoothly, preventing excessive threading.Suitable for manufacturing new threads or repairing damaged threads on metals such as carbon steel, cast iron, aluminum and stainless steel.describe: Name: tap die setMaterial: Metalcolour: silverPackage Contents: 1 x Tapping die setOnly the above package content, other products are not included.Note: Light reflection 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.