SUPER SCANNER V METAL DETECTORUltimate sensitivity: detects medium sized pistol from 9`` distance; large knife from 6``; razor blades and box cutters from 3`` distance; foil wrapped drugs and tiny jewelry from 1``. Self calibrating: digital microprocessor technology eliminates the need for periodic sensitivity adjustments. Rugged, high impact ABS case with reinforced coil compartment. Exceeds Mil Std 810F (drop test) Method 516. 5, procedures II and IV. Large 8`` scan surface for