I have two metal storage sheds and the plastic gizmos that attach to the top of the sliding doors and slide back and forth in the u-channel above the door have most of their projections broken off and make the doors almost impossible to use.
I have improvised replacements using bushings and screen-door rollers but they work poorly.
I unsuccessfully asked at Home Depot and Lowes. I tried Google with no useful hits; perhaps I used the wrong search words. Anyone have any suggested sources for these little plastic devices?
TIA