When determining the length of a grab bar needed, keep in mind that the overall length of the grab bar is about 3 inches longer (3.125 - 3.25 inches depending on the style of bar) than the name of the bar. So a 24 inch grab bar would measure about 27 inches end to end with the points for attachment 24 inches apart.
24 inch grab bars are the most popular choice in most bathrooms. They are frequently installed on a slightly sloping diagonal or horizontally to double as a towel bar along the far interior wall of the shower or tub to assist bathers who need a sturdy handhold while soapy and wet. While installation into studs is always ideal, state of the art Snaptoggles and Secure Mount Anchors can make any installaltion in a hollow wall easy even if you can't locate the studs. All of our 24 inch grab bars meet or exceed ADA guidelines for safety in the bathroom.