Bolting without protrusion
Compared to traditional bolting, the nut is recessed by making a wider hole. in this way there are no protruding elements. Clearly the thickness of the material must allow the recess and the length of the screw must be slightly lower than the total thickness of the materials to be joined.
Wall anchors for wall mounting
After drilling a suitable diameter, insert the plug and screw it, expanding it compresses the surrounding material and guarantees the seal. For this reason it is important not to create holes that are excessively large with respect to the diameter of the dowel.
Works with the same principle as plastic dowels only that it is suitable for bearing larger loads.
Butterfly anchor or anchor
It consists of a bolt at the end of which there are two metal wings that open automatically thanks to a spring once inserted into the wall. They guarantee a good seal but are only suitable for walls made of perforated bricks. To understand if the wall is suitable to beat with your hand, if it sounds empty, it is almost certainly a hollow brick.
Rubber models are also suitable for prefabricated and chipboard and prefabricated walls.