BMG 222 Magic-Mark-It Ceramic Tile Installation Measuring Device Tile installation made easy, marks several tiles at once, even complex ones (Diagonal, brick joint, etc) The easiest, fastest measuring system in the industry with One-time Adjustment for entire installation Made of CP-1000 impact resistant acrylic Works on 10&#8221; &#8211; 17&#8221; straight, and 8&#8221; &#8211; 12&#8221; on diagonal for ceramic tile, marble, wood, stone, vinyl, etc. Includes how to video on measuring and marking tile on diagonal, brick joint, decorative borders, vinyl, and more