Tavy Tile Puck Level & Lippage Detector It's great for setting tiles but bad for hockey. If you want to instantly know if your tiles are level, this is your tool. It is easy to use and will eliminate the need for any other level. Features It makes the accurate setting of marble quicker and easier! It can be used for any number of leveling applications Showers, seats, countertops, Kitchen appliances, machines, you name it Made of non-marking polyethylene plastic, it measures only 5" in diameter, 1" thick, and weights 10 ounces 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 Armen Tavy Says... My Tile Puck is placed on the first piece of tile or stone, allowing you to level this first piece in one operation quickly. This process is repeated over the next row of tiles, and then the Puck can be moved across these tiles that are set to check for any high spots. The 10 oz weight of my Puck creates a definite clicking sound as high spots are found, which allows the tile setter to make necessary corrections before it's too late.