Makes it easy to do linear, area and volume take-offs with speed, accuracy and confidence. Fast take-offs improve productivity. Accuracy helps to ensure profitability. 72 Built-in scales cover most practical print/plan applications. Select the most appropriate measurement units: decimal feet, feet-inches, decimal inches, yards, millimetres, meters, including square and cubic formats. 72 Built-in scales, 6 user-set "Custom" sales, 2 built-in memories. Lock switch so you can lock in the mode and scale to not inadvertently change them while rolling. Built-in counter, subtract measurement key, roll in either direction and large, easy-t6o-read LCD.