Prime Line Nylon Base Bi-Fold Door Bottom Pivot Cox 2-Pack N 6584This is a bottom mount pivot used on Cox and a variety of other bi fold door manufacturers. The 7 16 in. diameter nylon base houses a 3 16 in. pivot with a hex head nut for adjustment. It fits 1 in. to 1 3 8 in. thick bi fold doors weighing up to 30 lbs. each. Used on Cox and a variety of other bi fold doors Fits doors 1 in. to 1 3 8 in. thick Bottom mount Nylon base with hex head nut Easy to install Maximum weight limit is 30 lbs A soft mallet may be