Uxcell 3Pcs Metric Hand Tap And Die Set, M12 X 1.25 Taper/Plug Thread Taps 2pcs Metric Hand Taps (1pcs x Taper Tap, 1pcs x Plug Tap): 1pcs Round Die: 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. Uncoated tap die set provides good cutting performance. Hand Tap Die Set: Taper/Plug Taps: thread size: M12 x 1.25 (right hand); total length: 89mm / 3.5"; thread length: 29mm / 1.14"; square shank width: 7mm / 0.28"; accuracy: H2. Round Die: thread size: M12 x 1.25 (right hand); outside diameter: 38mm / 1.5", thickness: 10mm / 0.39" Features: Taper Tap: Starts the thread and guide it into workpiece, commonly used when tapping through holes. Plug Tap: Creates deeper threads, suitable for through-hole and blind-hole applications. Straight flute taps provide clear threads and fast downward chip removal. Round die features conical locking hole, strong locking and not loose. Wide Applications: Metric tap and die set can re-thread damaged or jammed threads, or to create new threads. Suitable for tapping through or shallow holes in mild steels, aluminum, iron, copper, hard plastic. The surface is lubricated with grease to prevent rust. Easy to Use: The tap die set is mainly for hand use (the thread tap is used with a tap wrench and the round die is used with a die stock). Apply appropriate cutting lubricant or oil during the tapping process for higher quality threads and more durable tools. Tips: Ensure proper alignment, use proper tapping technique, and apply consistent pressure as you turn the tap to achieve clean, precise threads. Periodically reverse while tapping to break up chips and remove debris from the flutes, preventing clogging and ensuring smooth operation.