It is used so much in the single frames what in bifoliate frames or is doors or they are windows. It functions as extra locking in the frame giving the biggest safety after with this it is
inviolability. It can be placed in the all frames, old or new, but also in the all lines of profiles that exist. Exists possibility of placement of two items in each frame for still bigger safety.
Usually when we used one piece placement become in the middle of frame while with use two you become the one in the above part and the other under. The lenth of pin is 12cm. Other available colours
are black, brown and silver.
It is externally applied in drawn frames.