Calzo C-LEVEL Self-tapping: This part is placed under the tile, provided with two lateral wings that determine the thickness of the joint and male spigot for the coupling of the "self-extracting C-LEVEL thread"

C-LEVEL thread Self-extracting: With two flexible side flaps, which guarantee quick insertion and removal of the "self-tapping C-LEVEL shim", without screwing and unscrewing.