Use the SBV for shelving, counter brackets, or window ledge supports. Reversible for nominal 10 In. or 12 In. shelves of any thickness. Holes are sized for 1/4 In. fasteners or 10d commons. 16-gauge galvanized steel.From the ManufacturerUse SBV Shelf Brackets for shelving, counter brackets and window ledge supports at a very competitive price. These brackets are great for garage projects and workbench construction. Reversible for nominal 10-inch or 12-inch shelves of any thickness.