These pulleys and straps are constructed from heavy duty steel. The 3/8" bore size is the diameter of bolt it will accommodate. The width of the pulley at the bore is ¾". It will accept a cable as large as 1/4'" diameter. This long life steel pulley is fully riveted, has a case hardened race with nine ball bearings and is factory lubricated..... Garage doors have either torsion springs or extension springs to help lift the door weight. Extension springs, or stretch springs, expand in length when the door closes and they have a pulley attached with a clevis to it. The cable goes around this pulley, see photos above. If you have this type of spring, one of the most common garage door hardware problems is worn out pulleys. There are four pulleys on a garage door extension spring set-up, two bolted in a stationary position at the front wall above either side of the track's curve, and two pulleys with yokes attached to the extension spring(s) above each side track..... If your pulleys wobble they should be replaced before they totally wear out and bind up the door. If one pulley is going bad the others will most likely wear out soon also. Click the 'add to cart' button above for a complete kit Now!

• TWICE THE LIFE 0F REGULAR 3" PULLEYS. These are 200 lb. rated, not the 100 pound rated ones.
• GREAT VALUE, 2 Stationary Pulleys and 2 rear Pulleys with Clevis Fork, 2 Bolts and Nuts
• HEAVY DUTY STEEL CONSTRUCTION, CASE HARDENED Race with 9 ball bearings, factory lubricated
• BOSTON ENTERPRISESTM also has cable kits with 1/8 and 3/32 inch lifting and safety/restraint cables
• COST LESS When You DO IT YOURSELF. Pack of 4, have them when needed

TWICE THE LIFE 0F REGULAR 3" PULLEYS. These are 200 lb. rated, not the 100 pound rated ones.BOSTON ENTERPRISES