Use this towel bar inside the shower, or out. Two super strong Power Lock suction cups securely hold this bar in place. The suction cups will hold on smooth surfaces like glass, fiber glass and tile. It is made of durable stainless steel wire that has been polished to a mirror-like finish. Wire drains and dries quickly, making it perfect for the shower. With the proper care, stainless steel will not rust. Lift, push and lock feature for secure adhesion to smooth surfaces. Easy to install - no hardware needed.