To be used in conjunction with the Wickes Wet Room Linear Solution sku 212867 This is to be used when installing the Wet Room Linear Solution into a concrete floor. The grip claw fits the brackets of the lower part of the channel & the legs are screwed into the floor. It is easy to adjust so that the upper edge of the tile frame is in line with the floor. The concrete must be sealed with the Primer (supplied within the Tanking Pack of the Wet Room Linear Solution) before the two coats of Elastogum are applied. We strongly recommend viewing our installation movie before purchase & during installation.