Steel Folding Security Gates provide security, ventilation and visibility for dock doors, lift-up doors, hallways and entranceways. They are used by manufacturing and warehouse facilities, retail and distribution centers and education & health care institutions. The folding gates are made of 3/4″ wide 14 gauge steel channel, riveted back to back with solid steel rivets. Solid rivets provide abundant strength to last longer under any conditions. We use 1-1/2″ x 1-1/2″ x 1/8″ thick hot rolled angle iron for upright gate rails, that resist abuse and last longer than thinner alternatives. Our drop pins are made of 5/8″ round rod and the casters are steel. The gates are coated using black enamel paint.