Tub & Shower Grip Bar with lock 'n hold suction cups installs anywhere for added safety. Just push the lever to activate the super grip suction cups. Position on a tub rim or shower wall and you'll have a helping hand where you need it most. Just release the lever to reposition. Won't mar surfaces. Works on tile, porcelain or fiberglass. Made of sturdy plastic. Two sizes: 12 L with 3 3/4 diam. suction cups, and 16 L with 4 diam. suction cups.