The TAVY Tile Puck is easy to use and will eliminate the need for any other level. The TAVY TILE PUCK can be also be used for any number of leveling applications: appliances, machines, shower seats, curbs, counter tops, kitchen appliances, cabinetry, drains, shelves and countless other leveling applications. Directions For Lippage Detecting: Slide the TAVY TILE PUCK back and forth on walls or floors from tile to tile or slab to slab and listen for clicking to detect lippage. Directions For Leveling: Place the TAVY TILE PUCK on any portion of any flat surface to get an instant reading in all directions at one time. Helpful Hints: Gently spinning the TAVY TILE PUCK when using it will help keep the edges sharp.