This is a floor and jamb mounted bottom pivot bracket. Typically used on Acme bi-fold doors and a variety of other door manufacturers. Constructed from stamped steel and comes with a zinc plated finish. It features an adjustable self-lubricating nylon bushing. Can be used on doors 1 in. to 1-3/8 in. thick. The maximum safe weight capacity is 50 lbs. per door. All the necessary mounting hardware is included for a quick and easy installation.