• Designed for use on box rail with wood-frame sliding doors from 1-1/2" to 2" thick
• For use with #59, #5100, #5103, #5104, #5105, #5110, #5114 or #5116 box rail
• Packed with 2 end caps and bolts for attaching door strap
• Adjustable both laterally and vertically
• Comes with self-lubricating Delrin® bearings
• Made of durable one-piece, precision-formed steel
• Safe Working Load - 225 lb. per hanger
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• WeatherGuard
• When subjected to 312 hours of salt fog spray testing (BHMA A138.18), zinc plated hardware showed severe corrosion while hardware with WeatherGuard™ protection withstood these harsh conditions with very little deterioration.

   National Manufacturing's website