1UPGRADE PROFESSIONAL TILE LEVELING SYSTEM: Tile leveling system is an excellent tool for floor and wall setting. The floor leveler spacers keep the tiles in the same horizontal position to avoid shifting during the mortar setting process. 2EASY TO USE: Unlike ordinary leveling wedges and pliers, this system requires no tools. Simply insert a 1/16inch (5mm) steel t pin along the seam of the tile, rotate it 90 degrees and press the black handle to keep the tiles at the same level, wait 46 hours and remove it before the cement dries. 3REUSABLE: Our tile leveler spacer kit is made of plastic and the steel t pins are made of stainless steel, greatly reducing the possibility of breakage. 4EFFICIENT AND BEAUTIFUL: Tile leveling spacer system helps diy and professional tilers to improve the efficiency of tile laying, providing you with a perfect tile surface while reducing installer fatigue and saving time. 5WIDE APPLICATION: The floor leveling kit keeps your tiles level by simply pressing the handle, multiple adjustment points, and real time scientific adjustments. This tile leveling system is suitable for tile gaps between 2mm to 6mm, and also for tiles with a thickness of 8mm to 12mm.