Because the housing here skews older than the rest of the area we work, we carry springs sized for the heavier, thicker doors common to 1950s and 60s construction, not just the lighter-gauge stock doors that showed up in later decades. That means torsion springs in a wider range of wire sizes, rollers in both nylon and the steel ball-bearing style older doors sometimes still run, and extension spring safety cables, which a lot of pre-1970s installs never had. We also stock the fasteners and brackets that this era of framing actually takes - not every opening here is square after sixty years of settling. What we don't carry on the truck is obsolete OEM panel stock from doors that were discontinued decades ago; if a full original panel is what you need, that part may take a special order, and we'll tell you that up front instead of pretending otherwise.