General description 100% new and high quality, this 20-piece Hand Tools Plating Tap Dies Set is made of high-quality metal materials. It is designed for creating threads in various materials, particularly those with a hardness below 25 degrees, such as cast iron and plastic. Please note that it is not suitable for use with harder materials like stainless steel and quenched iron. Technical specifications Set includes: 1 piece Adjustable Tap Wrench (M3-M12) 1 piece Adjustable Die Twisted Hand 9 pieces Tap Stock: M3*0.5, M3*0.7, M5*0.8, M6*1.0, M7*1.0, M8*1.25, M9*1.25, M10*1.5, M12*1.75 Measurement allowed error: +/- 1-3cm Other information Color may vary slightly due to light reflection and different displays.