Protecting profile for step edge

The stair arris inner module, comprising a pedal angle; the element comprises a pedal Hebei, wherein free end of the stair tread screw and bitbinary part of. The pedal angle is provided with a top of the edge wing; and cover plate of bitbinary part is formed between a. The assembly further - comprising base are element, and is fixed on the stair structure. The pedal angle and fixed by the adjustable height of the base are, element, wherein the pedal angle height adjustable according to the thickness of the pedal material, the cover plate of bitbinary part of the upper cover of rock.