The QEP Hard-Style Tile Spacers offer the choice of a traditional vertical tombstone-style or inset leave-in installation method. QEP Leave-In Spacers are constructed of hard plastic, so they will not compress when used with marble, stone and large format tile. These spacers feature a lower height profile, so they can easily be covered when grouting. When used in tombstone style, these hard tile spacers can also be easily removed and reused.