STRUCTO-CAST LEVEL: The level features a tough non-conductive and non-corrosive Structo-Cast frame that will not scratch fine wood or painted surfaces ROBUST CONSTRUCTION: Features durable acrylic vials that are impact-resistant EASY TO USE: Quik-Change replaceable vial covers that make it easy to use for you at the job site IDEAL APPLICATION: Ideal for general construction and remodeling tasks. PRODUCT SPECIFICATIONS: Comes with three easy-read vials for plumb; level; and 45 degrees