I put a pair of these on my garage wall as home for the 37L panniers when not in use. Sufficient options with the number of pre-drilled holes. The panniers hang on tabs that hook into the lid additional luggage bars. This creates a cantelever effect, strengthen the support with no danger of the bags weight pulling the bracket loose. Also, means the mounting rails that attach to the bike are not used, so no risk of damage. They look simple, but a lot of thought went into them. Tip: when placing the panniers, present then at 45 degrees away (bottom out from wall) for a clean hook up on the tabs.