For use with wood screws, chipboard screws and self-tapping screws. The SX version is used for optimal load-bearing capacity in perforated building materials, aerated concrete and bridging plaster. 4-way expansion guarantees a high degree of fastening. Resistance to temperatures from -40 ° to + 80 ° C. Suitable for: concrete, prestressed concrete slabs with hollow core, natural stone of dense structure, solid brick, solid gypsum panel, vertically perforated bricks. For fastening: paintings, baseboards, electrical switches, small wall shelves, towel rails, cabinets with light weight mirror, mailboxes, hanging jardinieres. Specially designed wings and protrusions on the dowel prevent the dowel from rotating when fixing the chipboard. Advantages: Anti-rotation wings prevent the plug from turning in the drilling hole; The unique design allows application in all building materials. The necklace prevents the plug shape from slipping into the drilling hole; The central part of the plug is designed so that the screw passes quickly, which allows quick and easy installation.