ProBasics Grab bar is constructed of heavy-gauge steel for added stability with a knurled chrome-plated finish which provides a secure hand gripping surface.1" Heavy gauge steel tubing with 2.5" diameter mounts. Stainless steel hardware included. Mounts vertically or horizontally. 1.5" wall clearance. Diamond knurled finish provides secure hand gripping surface. Warranty: Limited lifetime on frame, one year on all parts.