For an off-track call in Lake Forest Park, the truck carries track sections and brackets in a couple of the common older sizes, rollers in both nylon and steel, and cable to replace anything frayed while we're already in there. We also carry lubricant rated for the COLD moderate swing this area gets, since a re-hung door still needs to move smoothly through winter stiffness, not just sit back on the rail. What we don't carry is every historical track profile a house built around 1968 might have used - some of those brackets were proprietary to a builder or a since-discontinued opener line, and if that's what's on your door, we'll tell you on site rather than guess with a part that won't fit. That's the one honest limit here: a straight re-hang we handle same-visit; a match for old, discontinued hardware sometimes means a short wait on parts.