YISINIUTUO NPT Hex die set can fast and effectively repair damaged threads, it can process the external threads and make fast re-threading of stainless steel, carbon iron, copper, aluminum, mold steel, etc.
Including 8pcs NPT pipe tap: 1/16", 1/8", 1/4", 3/8", 5/8”,1/2", 3/4" and 1"; 7pcs NPT pipe dies: 1/16", 1/8", 1/4", 3/8",1/2", 3/4" and 1"; 1pc portable storage box.
Each of the tap and die has sharp and neat threads, with NPT standard, ensure a precise thread restoration.
This NPT taps are made of latest high speed steel and the NPT dies are made of latest high carbon steel. The mechanical properties of the material are higher, and the service life is longer.
Crafted from Cr-V steel with a black phosphate coating, this large crows foot wrench set ensures superior durability and corrosion resistance.