The Two-Pitch Distributor Screw gets the matrices back twice as fast, everybody knows that; but not everybody knows of its other important advantages:

The narrow grooves in the distributor screws. hold the matrices vertical and keep them from twisting and turning on the bar, increasing life of tooth combinations.

The Spiral Automatic eliminates the channel entrance stopping bar and provides an instant and simple means of stopping the screws if a matrix fails to distribute.