This slotted angle-iron by Precison(R) is made of galvanized steel. With a thickness of 0,074", both sides of this 36" long angle bar are 1 1/2" wide. This slotted, right-angled metal bar can be used to custom build racks, scaffolds, ladders, shelving units, etc. It is also possible to use it for securing overhead garage door tracks and electric openers. Furthermore, the elongated holes of this versatile steel shape allow for perfect alignment and adjustment.