This versatile MARSHALLTOWN Tile Cutter can cut ceramic; glass; and mosaic tile up to 17in long and ½in (12 mm) thick. You can also cut tile up to 12inx12in (305 x 305 mm) at a 45-degree angle for different tile installations. This tiling tool has a two-rod rail system that allows smooth operation as the tungsten carbide scoring wheel scores the tile for quick; easy cuts. It also includes an adjustable measuring guide for precise cuts. Note: Not recommended for porcelain tile.