The CRL Chrome Plated Drilled Glass Shelf Brackets for the Cable Display System will securely and efficiently hold your panels onto the stainless steel cables. A 1/2" (12 mm) drilled hole is required in your glass, acrylic or wood panels to enable the installation of the Drilled Shelf Brackets which unscrew to permit the shelves to be installed. When the cables have been inserted through the lower half of the fitting, thru the panel, and thru the upper half of the fitting, the Bracket can be screwed together. Once installed, the shelves can easily be re-positioned by depressing the lower part of the Bracket and sliding the shelf to the desired position. One each is the minimum order.