ATR Tile Leveling Alignment System Offset T-Shape Spacers 570 SQ FT 3mm Spacers.For use with brick pattern, subway layout, herringbone, etc.T-Shape Spacers for Offset Layout. About 570 sq ft coverage area, depending on the size of the tile. See Grid Tile Installation Pattern Chart ImageKit Include: 500 T-Shape Spacers, 100 Edge Spacers, 200 (Re-Usable) Pre-Assemble Spindle, 10mm socket and Tool Bag(1 per customer) Grout spacer 3/32" (2mm) Grout spacer 1/8" (3mm) Tile thickness 15/64 - 51/64 (1/4 - 3/4) (6mm-20mm).The new spindle features a new screw element with a larger head and grip element, 4 segment viewing windows for easier viewing access. With ATR tile system you only need 1 cross spacing plate for 4 tiles NOT 4 clips like other Leveling Systems Very easy to learn and use at any skill level. No Tools (GUN) needed! No need for expensive hand tools. Simple and quick to lay with only 2 elements: Spacer & Spindle. The only system that removed without the use of a force. Only System that leave clean grout line (no risk of spacers not break all the way). Cross Spacers (+) Shape allow for 2/3 of saving. Creates a lippage free surface. Keeps tiles in place while drying. Saves time suitable for floors and walls. Suitable for indoor and outdoor uses. Re-usable spindle. Australian design and Australian made.How to use 3 Easy steps: Spread thinset install tile Screw spindle into spacing plate, Slide spindle with spacing plate attached in between two tiles. Tighten spindle clock wise firmly until all four corners are aligned flush. •  Remove Re-usable spindle once tile adhesive is dry.