A grab bar, attached securely to the tub wall, provides support while transferring into and out of the tub or shower.  This type of safety bar is ergonomically designed to be easily grasped when stepping to and from the bath and offers the support that is needed to avoid slips and falls.  These bathtub grab bars are available in a variety of styles, handle heights and gripping surfaces, and weight capacities.  Most tub rails are designed for self-installation and are non-marring to the tub wall.