ATR Tile Leveling Alignment System Pro Spindles 100 pieces100 Re-Usable Pre-Assemble Spindles 20mmInclude 10mm socketATR Tile Leveling is a 2 Part SystemThe new spindle features a new screw element with a larger head and grip element,4 segment viewing windows for easier viewing access and much more robust which means you will get more uses and will save you long term expensesAdvantages of the ATR Tile Leveling:1. The universal Spindle removes cleanly and easily, without any force applied, eliminating risks of fragmenting tiles or leaving any unwanted obstructions behind2. ATR Leveling System the only system not to leave any straps or obstructions between the grout joints once the spindle is removed3. NO SPECIAL TOOLS REQUIRED, for the advanced professional a simple socket and a cordless drill (optional) may be used to install and remove spindles so you are not depending on a broken gun or a single gun on the job site4. The ATR spacing plates lock the tile into position giving you the most perfect intersection of the tile and straight lines without requiring consistent adjustments5. Great labor saving 4 to 1 ratioHow to use 3 Easy steps1. Spread thinset install tile2. Screw spindle into spacing plate, Slide spindle with spacing plate attached in between two tiles.3. Tighten spindle clock wise firmly until all four corners are aligned flush.x Remove Reusable spindle once tile adhesive is dry.