Features and Benefits:�Durable vials read plumb and level�Establish plumb or level on decks, fences, and support poles�Strong magnetic edges (721)�Durable Polycast constructionThe Empire 721 magnetic Polycast post and pipe level is features sturdy, high impact Polycast® construction. Durable vials read plumb and level for easy work on decks, fences, and support poles. A magnetic edge makes this ideal for working with metal surfaces.