The Wall System 12 concealed anchoring system is specially designed for large 12 mm-thick porcelain stoneware slabs, which can be produced by Ragno to meet specific customer requirements. It is based on innovative custom-made technology in which the slabs are anchored in a manner similar to that of the AGS concealed system, with special expansion anchor bolts and according to a fixing system consisting of vertical uprights and cross members. Aluminium profile bars are mechanically fixed to the back of the slabs in order to distribute the loads acting on different points.