This super strong lever-release suction cup is specially designed to fit any attachment in the Vac-U-Lock collection and powerfully adheres to any smooth. non-porous surface. This suction cup was designed for hands-free use of all your favorite Vac-U-Lock™ products and is ideal for shower/bath use. The strong adjustable arm swivels and bends for custom positioning. and locks into place. Includes complete instructions for use.