Residential/Light Commercial: Bipass 12-610 QuikTrack   Cox Series 12 By-Pass Door Hardware has become a standard in the industry. But the new patented design that combines easy-to-use 3" aluminum fascia with the cost savings and strength of galvanized steel track, make the new Cox Series 12-610 QuikTrak the new standard for the industry for installing all types of by-pass closet doors. 04 Series   Cox has developed a complete line of accessories to supplement all standard series hardware. All accessories are precision made of the best material available with strict quality control to assure the finest parts to complement your door installations.  31 Series   CONCEALED TOP-MOUNT HARDWARE Doors 1 3/8" to 1 3/4" (35-44mm) Up to 75 lbs. (34kg) Cox Series 31 top-mounted hangers and V-groove track is the perfect hardware for surface mounted doors that roll parallel to a wall. The hangers are self-centering and easily adjusted with a regular or Phillips screwdriver. The Cox exclusive spoked design Celcon® wheels provide free, smooth rolling operation. Complete satisfaction, long-life and economy are guaranteed when you specify Cox Series 31. 12 Series   ADJUSTABLE DELUXE HARDWARE Doors 3/4" to 1 3/8" (19-35mm) Up to 75 lbs. (34kg) Cox Series 12 By-Passing hardware has become the standard in the industry. Improved, extra strong, easy to adjust. Single or double wheel hangers are self-positioning and reversible, one set will fit either 3/4" or  1 3/8" doors. Simple formed V-grooved track allows the least amount of friction for smooth rolling doors. Simple 4 step installation makes Series 12 the fastest selling hardware for fine wardrobe doors. 32 Series   CONCEALED TOP-MOUNT HARDWARE Doors 1" to 1 3/4" (25-44mm) Up to 175 lbs. (78kg) Cox Series 32 is everything hardware should be, and more. From the V-grooved galvanized steel or extruded aluminum jump-proof tracks to the 3 and 4 wheel axle bearing or 4 wheel ball bearing carriers, Series 32 offers fast, easy installation and years of smooth, quiet, maintenance-free performance. 15 Series   HEAVY DUTY COMMERCIAL HARDWARE Doors 3/4" to 1 3/4" (19-44mm) Up to 100 lbs. (44kg) Cox Series 15 by-pass hardware features rugged durability for years of trouble -free service. The exclusive spoke design Celcon® wheels on each self-leveling hanger maintain true concentricity and equalize the load for quiet, jump-proof, smooth, fingertip operation. Long-life, fast installation and easy adjustment assure owners and installers of top performance at an economical cost. 42 Series   CONCEALED MULTI-SLIDE HARDWARE Doors 3/4" to 1 3/8" (19-35mm) Up to 50 lbs. (22kg) Cox Series 42 Multi-Slide answers the need for closures of wide openings where space is at a premium. The nylon 4 wheel carriers assure continuous, smooth and trouble-free operation.