click system: distance sleeve and attachable plug with fit-up aid (centre to edge: 28 mm), designed for wall mounting signs without drill holes, distance sleeve made of nickel-plated brass, attachable mounting piece is made of transparent polycarbonate, comes with shaped pieces made of double-sided adhesive film (VHB quality from 3M), screws, dowels, double-sided adhesive placement rings and headless screws for security (for quantity see the number of wall fasteners), includes Allen key, given dimensions: d = distance between wall and back side of the sign