This wall adapter takes the bars off the shelf and onto the wall away from the stream of water. Works with life preserver stands sold separately. Works only on glass, porcelain, polished ceramic, marble, or flat, non-porous tile. Does not stick to stone or across grout lines. EASY INSTALL: TWIST-LOCK SUCTION CUP! No tools. No Damage. Renters' delight! This rack is intended for non-porous surfaces only (glass and smooth tile). Not recommended for heavy textured or small tiled walls. WILL YOU...