The Steelworks #14 ga slotted steel flats are perfect for a number of uses including the mounting of garage doors, shelving, tool racks and corner braces. Made of corrosion-resistant galvanized zinc, these flats feature holes punched to match a compatible slotted angle. Fasteners can be applied through the holes for secure installation. Zinc-plated steel products should not be welded due to toxic fumes.