This versatile MARSHALLTOWN Tile Cutter can cut ceramic, glass, and mosaic tile up to 17 long and (12 mm) thick. You can also cut tile up to 12x12 (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.