This system interlocks the tiles, creating a single flat slab surface while the setting material is curing. The interlocking design reduces, and in most cases eliminates, settling from shrinkage and the possibility of warping. The Tuscan Leveling System reduces the need to re-lift tiles to add more mud and/or the process of shimming tiles, thus increasing the speed of installation, all the while creating that much desired lippage free mirror surface.