QEP's Leave-in Hard Style Tile Spacers offer a faster and easier way to space and align tile during installation. Simply position the Leave-in Spacer at the corner of the tile, adding more spacers as each new tile is placed alongside. Push tiles together so that all tiles are touching the Leave-in Spacers and so corners are squared-up. QEP Leave-in Spacers are hard style, meaning the spacers will not compress when used with marble, stone and large format tile. The 1/16 in. Leave-in Spacers have reduced height profile so they can be easily covered when grouting. Therefore they do not need to be removed before grouting, saving time and effort. Material: Plastic.