Calculated Industries 6020 Scale Master Classic Calculator  

• Manufacturer  Calculated Industries
• Part#   6020 
• 72 built-in scales for more versatility
• Six user-set custom scales calibrate out-of-scale plans
• Two built-in memories for easy area/volume and storing values
• Lock switch prevents inadvertently changing mode or scale while rolling
• Lock switch prevents inadvertenly changing mode or scale while rolling