Troxell USA Horseshoe shims are made of hard plastic for minimal compression. Great for tile, marble and granite installation. Horseshoe design enables the installer to lift both corners to align joints for level and uniform appearance. Easy to install & Easy to remove. Color-coded product and containers for easy identification. Horseshoe Shim Tile Spacers are the perfect choice for spacing and aligning marble, granite, stone, and large format tile installations. The Horseshoe Shim design has a pro-proven track record for quickly and easily, spacing and aligning both horizontal and vertical tile.