Specifications:Round Dies Size:Thread Size: M3 x 0.5, M4 x 0.7, M5 x 0.8, M6 x 1.0, M8 x 1.25, M10 x 1.5, M12 x 1.75;Outside Diameter (OD): 25mm / 1.0"; Thickness: 9mm / 0.35";Material: High-speed SteelDie Stock Size:Size: 25mm (1"); Inner Hole Size: 25mm x 9mm / 1.0" x 0.35" (D*H); Fit Capacity: 17mm-25mm;Overall Length: 200mm / 7.87"; Handle Length: 68mm / 2.68"; Handle Diameter: 8mm / 0.3";Material: Zinc Alloy (Body), Carbon Steel (Handle)Descriptions:Round dies are suitable for general purpose threading. Great for re-threading existing threads in hard materials like metal, or making new threads in soft material like plastic. Suitable for mild steel, aluminum, stainless steel, iron, cast iron, alloy steel and carbon steel. Well suited for maintenance and repair work.The die stock is suited for 25mm (1") outside diameter round dies. Provides good wear resistance for long service life. With one adjustable screw, the die stock can securely hold round dies and is easy to operate.The die and wrench set can improve the efficiency of processing threads, and is a necessary tool for hand tapping operation.Package Included:1pcs x Die Stock Handle Wrench, 7pcs x Round Dies