The slotted angles are made of Pre-Galvanized Steel. Most Angles are punched with multidirectional slotted holes and round whole perforations. Often used to affix and support the weight of an overhead garage door and channel to structural supports along the door’s opening and the structure above. Angle is the most versatile, time and cost effective construction material available for building carts, ladders, benches, shelving, cases, racks or any other type of structure. They are the main components that hold the entire structure together. The offered slotted angles are made for easy installation and use. They are very efficient and high quality.