"D" type is suitable for harder non ferrous materials, such as a hard hat (HDPE), truck tyre etc.
FEATURES: 1. Accuracy: ±1 HD 2. Resolution: 0.1HD 3. Calibration Certificate Included 4. Conforms to ASTM D-2240-05, GB/T-531.1-2008 /ISO7619-1:2004 5. A large, easy-to-read LCD display with backlight 6. AC Adapter/Charger and Batteries Inc