1/4" Horseshoe Shim Tile Spacers are the perfect choice for spacing and aligning tile, marble, granite, stone, and large format tile installations. The Horseshoe Shim design are ideal for quickly and easily, spacing and aligning both horizontal and vertical tile. Horseshoe Shims are injection molded for dimensional accuracy and do not compress under heavy loads This makes them especially beneficial in vertical installations. DTA has been servicing the tiling industry for over 40 years. Quality is our reputation. 100 piece bucket.