Leveling system: T-shaped leveling system for ceramic tiles. Function: to keep the tile balance in the same horizontal position and prevent the tiles from moving during curing. Suitable tiles: thickness: 3 mm to 17 mm distance between tiles: 2 mm to 6 mm. Reusable: This tile leveling system and replacement needle fittings are reusable, it is easy to attach or remove with a special wrench. New design: Equalizer with solvent sealed on the head makes it easier to install toilets, sewers and any tile installations where leakage devices are needed. Instructions for use: 1. Remove the hair straightener and adjust the distance of the T-needle. 2. Insert the T-shaped needle along slot 1, then rotate 180 degrees. 3. Tighten the adjustment cover clockwise by hand or with a special wrench until both tiles are level. 4. Tighten the adjustment cap and tighten the T-needle at the bottom of the two bricks. 5. Within 6 hours of paving time, or with tile cement and glue before completely dry, rotate