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 meets standard processing requirements. Applications: Ideal for hole processing in repair and maintenance tasks. Suitable for drilling and tapping alloy steel, tool steel, cast iron, and various ferrous and non-ferrous materials. Features: The steel screw tap provides high hardness and toughness for enhanced wear resistance. The alloy steel round die delivers good abrasion resistance. The tap and die set is sharp and durable for long-term performance. Easy to Use: Round dies are compatible with a die wrench (not included). Insert the fixing screw from the wrench into the die slot and tighten securely. Machine taps can be used with drill presses, tapping machines, CNC machines, and milling machines. Tips: 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.