Scale Master Pro replaced the Scale Master Classic with a new design making it easier to hold and maneuver around your plans and drawings. The Scale Masters new dual LCD displays makes it much easier to read making it even faster to do linear, area and volume takeoffs with accuracy and confidence when estimating, bidding or planning. Use the Scale Master Pro on drawings, plans, blueprints and maps etc. even if out of scale. The Scale Master has 72 built-in Scales; 39 Imperial (Feet-Inch) units 33 Metric, and 6 custom user-set scales providing versatility with architectural, engineering and civil scales. The Scale Master Pro is the perfect tool for such professionals as: Contractors, Estimators, Engineers, Landscapers, Pipeline Builders, Excavators, Concrete Contractors, Electrical Contractors, Plumbers, HVAC, Fencing Specialists, Telecommunications, Cable System Contractors, Pavers or anyone needing fast, accurate takeoffs from plans and blueprints. Includes: Hard cover protective case, user Guide, (2) CR-2032 long-life lithium batteries and full one year limited warranty. It will pay for itself with the time savings and added accuracy the Scale Master Pro.