Rigid with 2-51F and 1-51G brackets with lag. Designed for use on wood-frame sliding doors from 1-1/2 in to 2 in thick. Slot in top of door strap allows lateral and vertical adjustment. 1 pair 5005 box rail hangers, 450 pound capacity per pair. Packed with two end caps and bolts for attaching door strap. Made of durable one-piece, precision-formed steel and has self-lubricating Delrin bearings.
