When installing tiles, marble or stone, Tile Leveling Wedges work together with clips (sold separately) to ensure level tile surfaces with no tile to tile lippage. Wedges are part of a 2-part Level-Align-Space-Hold large body tile installation set (spacers sold separately). Wedges can be reused for multiple tile installation projects.
I used the LASH system for a small, 60 sqft, job. Tile size was 6 x 24 and a bit tough to line up for an amateur (me). The system worked well and really made a difference. With a couple of exceptions (my fault) the tiles are very true to each other. They are a bit tough on the hands after a few but perfect for small jobs. I have a big job to do soon and I think I will use one of the systems that have the tool to insert the wedges such as the RaimondiUSA system. Overall very satisfied and highly recommend for an amateur like myself. Job looks like a pro did it.