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.