Suitable for non-alloy steel and low-alloy steel, malleable cast iron and non-ferrous metals with strength up to 900 N/mm² Made of carbon steel, and long service life. This set contains many molds of different sizes, which are suitable for different threaded holes to meet your needs. Completely in a practical storage box. The faucet is packed in a plastic box for easy storage. This is a great set of tools, an excellent combination of customer service cars or workshops. describe: Name: Thread Cutting Kit Material: steel colour: As shown Package Contents: 1 x Thread cutting kit Only 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.