PICTURES ARE REPRESENTATIVE OF ITEM, BUT ARE NOT OF THE ACTUAL ITEM. Product dimensions, finish, head markings, thread length, stamping shape or forging shape, etc., may differ from picture. Products are guaranteed to meet the specifications to which they are manufactured. Specifications allow for tolerances in dimension and shape, which can vary from lot to lot. Can be used in ceilling, hollow walls, steel, concrete or wood. Requires smaller holes than toogle bolts. Applications include overhead doors, light fixtures, shelf brackets and cable television units. Carbon steel.