2pcs Thread Taps:
Thread Size: M3 x 0.5 (Right Hand); Total Length: 51mm / 2.01"; Thread Length: 17mm / 0.67"; Square Shank Width: 3mm / 0.12"; Accuracy: H2

1pcs Round Die:
Thread Size: M3 x 0.5 (Right Hand); Outside Diameter: 20mm / 0.79"; Thickness: 5mm / 0.2"

Descriptions:
M2 (6542) high-speed steel taps offer high hardness, good toughness, wear resistance, and excellent cutting performance. 9SiCr alloy tool steel die provides excellent hardness, toughness and wear resistance for durability.
Tap and die set can accurately cut, repair or clean threads. Straight flute tap process through holes or shallow blind holes and remove chips downward. Round die is suitable for threads on rods, bolts, screws, pipes and shafts, or just remove bolts and threaded rods. Widely used for most metals, iron, copper, zinc, alloy steel, abrasive steel, stainless steel, etc..
Metric tap & die has clear threads, no burrs, and right hand tapping direction. Thread die is designed with conical lock hole, strong locking force and no loosening. Uncoated tools feature just the base substrate, great for a wide range of applications.
Die is used with die stock wrench (not included). The fastening screw in the middle of the wrench should be inserted into the slot of the die and tightened. Machine tap is used in drill presses, tapping machines, CNC and milling machines. Apply appropriate cutting lubricant or oil for higher quality threads and more durable tap & die.
Tips: Control speed according to material hardness. The higher the hardness, the slower the speed. The force must be uniform in tapping operations. Drill the holes with a twist drill bit first, then tap with a thread tap. The tapping angle should be 90 degrees vertical and stable.