Meter indicator with zero-setting removable wrench

6 digits + 1 decimal, height: 8 mm – shaft D.7 mm – bilateral drive. Zero-setting removable wrench. Revolution: 0 = clockwise, S = anti-clockwise. Maximum speed: 500 meters per minute. Dimensions: 92x80x50. Adds in one direction of rotation and subtracts on the opposite. Ratio 2:1, for wheels developing 500 mm (2 revol. = 1 meter).