Compatibility: The M8 x 1.25mm left hand metric tap and die set is designed for manufacturing or repairing male and female threads, suitable for general purpose applications and meeting standard processing requirements. Applications: Ideal for hole processing in repair and maintenance work. Suitable for drilling and tapping alloy steel, die steel, cast iron, and various ferrous and non-ferrous materials. Features: The steel screw tap provides high hardness and toughness for excellent wear resistance. The alloy steel round die offers strong abrasion resistance. The tap and die set is sharp and durable for long-term use. Easy to Use: Round dies are compatible with a die wrench (not included). The fixing screw on the wrench should be inserted into the die slot and tightened securely. Machine taps can be used with drill presses, tapping machines, CNC machines, and milling machines. Tips: For best results, use with tapping oil to achieve high-quality threads and extend tool life. Apply appropriate lubricating oil to the cutting edges of taps and dies during operation.