Can be produced with three different kinds of perforations: cylindrical, step drilled and conical. The diameter of the perforations can vary from 1 to 6 mm. The maximum dimensions of the drilled plates are 6000×2000 mm, with a maximum thickness of 15 mm. After drilling, the plates are butter-finished and washed to guarantee perfectly clean perforations. They may undergo further surface finishing treatments, such as for example, sandblasting and electrolytic polishing. Different finishes or special coatings may be carried out following specific request by the client. The drilled plates can be produced in different materials such as: carbon steel, stainless steels, Titanium, Nickel-Chromium alloys, Copper and its alloys.