Features: brand new high quality Made of high quality material, durable Suitable for making or repairing male and female threads. For general purpose applications. Taps and dies are right-hand threads. For through-hole machining of alloy steel, die steel, cast iron, ferrous and non-ferrous materials, etc. Ideal for maintenance and repair work. High-speed steel (HSS) knives have high hardness and good wear resistance. After precision grinding, the taps and dies are sharp and durable, and the thread is clear, which meets the processing requirements. Easy to use, just insert the fastening screw in the middle of the mold wrench into the mold groove and tighten it. Machine taps are suitable for drilling, tapping, CNC and milling machines. Use with tapping oil to get threads and more durable taps. Appropriate lubricating oil should be added to the cutting edge of the die and tap when tapping. Product parameters: Tap: Thread Size: 1/4"-28 UNF; Thread Length: 28mm / 1.1"; Overall Length: 73mm / 2.87in; Square Shank Size: 5mm / 0.2in; Tolerance Class: 2B; Material: High Speed Steel (HSS) ; Type: machine tap Die: Thread Size: 1/4"-28 UNF; Outside Diameter (OD): 20mm / 0.79"; Thic kness: 7mm / 0.28", Material: Alloy Tool Steel; Type: Round Die Package Included: 1 * 1/4"-28 UNF tap 1 * 1/4"-28 UNF Die Note: 1.The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness. 2.Please allow slight manual measurement deviation for the data.