Spin Doctor Tile Leveling System Caps 100pcThe Spin Doctor Tile leveling system features a patented free spin design that allows the cap to spin down the spacer screw with minimal effort. This allows installers to tighten the cap with only one hand, which is especially useful for installing large format tile. When installation is finished simply kick off the caps to remove. The caps and baseplates are sold separately, the caps are reusable for multiple jobs. Reusable Cap for the Spin Doctor