Thread Plugs with Adjustable Wrench Screw Tap Dies Tool Set -12 Pieces Heat treatment, easy to start, cut or repair internal and external threads Protection: All your gear is kept safe inside the resilient case, and everything will fit in its given pocket appropriately Having been processed by anti-corrosive ways, the surface is stainless The set has a higher rigidity, better flexibility, longer lifespan Precision milled taps and dies for cutting raw material or repair existing threads, remove screws and more function.