Prime Line Bi-Fold Door Bottom Pivot Acme, Cox 2-Pack N 6546This is a bottom mount pivot used on Acme, Cox and a wide variety of different bi fold doors. The steel base houses a 1 4 inch pivot with a hex head nut for adjustment. It fits 1 inch to 1 3 8 inch thick bi fold doors weighing up to 50 lbs. each. Used by Acme, Cox and a wide variety of other bi fold door manufacturers Maximum safe load capacity is 50 lbs. Fits doors 1 inch to 1 3 8 inch thick Steel construction Bottom mount design Please refer to the