All listed dimensions are center-to-center lengths. Overall lengths are plus 2 3/4". Grab Bars are tested to comply with load bearing criteria as required by the Americans with Disabilities Act (ADA) and ASTMF-446. We recommend that these products be installed by a professional contractor to ensure compliance of proper mounting. Click here for the rest of the 1600 Series! Click here for the rest of the 1620 Series!