For the accurate measurement of external and internal edges and depth, transverse edges for internal measurements, flat depth gauge, caliper according to DIN 862, LED display, resolution 0.01 mm / 0.0005 inch, strong zeros at any point, ideal for differential measurements , with a locking wheel to determine the measured value, is provided in practice_x000D_plastic storage box, including 1.5 volt battery, type LR44.