AccusizeTools - Electronic Depth Micrometer 0-6'' with 4'' Base, P103-0178 Range: 0-150 mm / 0-6'', Accuracy: 0.003 mm, Base: 4 Interchangeable rods provide a wide measuring range High accuracy interchangeable rods enable that reading does not have to be reset when changing rods Resolution: 0.001 mm (metric); 0.0005''(Inch) No. of rods: 6