This extremely durable suction cup with a release mechanism is specifically designed to fit all accessories in the Vac-U-Lock collection and dynamically attach to any smooth, non-porous surface. This suction cup was designed for hands-free use with all your favorite Vac-U-Lock products and is perfect for use in the shower or bath. The strong adjustable arm rotates and bends for a customized position and locks in place. Complete instructions for use are included.