Readouts on the X- (crosslide) and Z-axes (leadscrew) can be reset to zero at any time with the push of a button. From there, as you move the 2" diameter handwheels, you can read the table position to 3-1/2 decimal places (.0005") on the digital readout. (Metric versions read to .01mm.) You no longer need to count handwheel revolutions or make difficult calculations when cranking in a negative number.