This barrel hinge needs to be welded on and will support a gate weighing up to 240 lbs. The pin and ring are made of brass and do not require a grease fitting. This hinge is 3-3/16" long with a 5/16" pin and a barrel size of 5/8". Each hinge weighs .4 lbs. Receive a quantity discount if you buy 10 or more and again at 175 or more.