Capable of multiple applications including flat roofs, metal roofs, parapets, skylights, stairwells, and rake edges on steep pitched roofs The U.S.A. Plate (Universal Shoe Adaptor part #12061) connects to virtually any mounting surface Plate can be screwed, bolted or welded and if necessary, left behind The Connector (part #12022) features a key lock button System comes complete with all 3 parts (individual components available as well) Maximum spacing 8 apart (used with construction grade lumber) Complies with OSHA regulations THIS ITEM DOES NOT QUALIFY FOR FREE FREIGHT. PLEASE CONTACT US AT 800-776-7613 FOR A FREIGHT QUOTE BEFORE YOU PLACE YOUR ORDER. OTHERWISE, WE WILL CONTACT YOU WITHIN ONE BUSINESS DAY OF RECEIVING YOUR ORDER TO PROVIDE A FREIGHT QUOTE