Improve tile installation speed and reduce installer fatigue/stress. Virtually lippage free, flat surface drastically. Reduce the need for grinding and polishing. Prevent tiles from moving while curing. Re-usable wedges. Can adjust and maintain the flatness between tile and tile. Simple operation, very easy to use to improve tile installation speed. Reduce installer fatigue/stress prevent tiles from moving while curing wedge spacer can reusable. Note: the cement must completely dry before removing the wedges and clips, otherwise, there will be easily appeared flatness error.