R33T7 SQ Trolley - Offset Bolt

R33T7 SQ Trolley used on 1.5" and 3.5" Doors. For wood or metal frame doors up to 450lbs. Includes 1.5" washer with flexible seat for 9" offset bolt. Offset bolt, steel, ball bearing allows for easy horizontal adjustment of door placement. Simply turn offset bolt into desired position and then fix lock washer to steel header. Packaged with PB301EC end caps.