the screw is useful for adjusting the angle of your saddle when you don't want the saddle rails to move forward or back. that's weird if the screw broke because it is really tiny




For those wondering how it works: The lip where the label front is holds the top piece and the screw tightens in the back to keep the rails in place without loosing your spot. Then you adjust the saddle angle, tighten, and you're set