To retain our goodwill as the prominent enterprise, we provide Mild Steel Plug Allen Key. This is utilized in plumbing, heating, and gas systems to block off or close the end of a pipe or fitting. They are often used in low-pressure applications, where the pressure is not too high and the temperature is not too extreme. Mild Steel Plug Allen Key is utilized to seal the end of a pipe or fitting. It is made of mild steel and has a hexagonal socket head on one end that requires an allen key or hex key to install or remove.