Designed for use with box rail on wood-frame sliding doors from 1-1/2" to 2" thick. For use with rectangular box rails. Packed with two end caps and bolts for attaching door straps. Slot in top of door strap allows lateral and vertical adjustment. Durable one-piece, precision-formed steel. Each hardened axle has 12 hardened and precision-ground alloy steel roller bearings. Delrin seals keep out dirt while holding in long-life grease. Safe working load: 300 lbs per hanger.

• 600 pound capacity per pair (2 hangers per box)
• Flexible with single door strap
• Steel with steel roller bearings
• Fits box rail / square
• Wheel diameter: 2.14"