Calculated Industries 6130 Scale Master II Makes it easy to do linear area and volume take-offs from blueprints and plans with speed accuracy and confidence. Perfect for estimating bidding or planning with measurement estimating capabilities that are extensive but easy to use. Six user-set inchcustom inch scales perfect for scaling faxed or out of scale plans. 72 built-in scales gives you more versatility 39 Imperial and 33 Metric. Includes: Two long-life Lithium batteries user's guide vinyl case 1-year limited warranty