Rock Solid Brackets Telescoping Support Arms are designed to simplify the installation of kitchen countertops, pony walls, or any heavy counter- and tabletop materials such as granite. Depending on the adjustable size(s) needed for the job, these telescoping arms are designed to be used in conjunction with plug mounting accessories to create a solution that simplifies the installation of heavy countertop materials. Rock Solid Brackets offers a full line of telescoping arms and mounting accessories that help turn a tricky job into a hassle-free one.