Features: * Rigid with 2-51F and 1-51G brackets with lag * Designed for use on wood-frame sliding doors from 1-1/2" to 2" 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 * Zinc plated What"s In The Box: * Stanley Hardware 112128 Trolley Door Hanger