Engineered with accuracy, durability and dependability. Accurate within 0.3mm. Durable impact resistant solid block acrylic vials and sturdy aluminum frame. Soft-touch ergonomic hand grips. Magnified horizontal vial with Glo-View maximizes vial readability. Removable shock-absorbing end caps. Engineered for the professional tradesman. Ideal for finish carpentry, bricklaying, framing, concrete construction, window fitting, road construction and landscaping work.