National Hardware Zinc-Plated Up to 2-1/4" Steel Barn Door Stay Roller features an embossed frame with two wings that provide greater bracing and holding strength d to conventional single-support, corner-iron frames. The Derlin wheel ensures rust- operation and is reversible, allowing use on either side of the frame. This adjustable roller is designed to guide doors up to 2-1/4 inches thick. It is zinc-plated and includes WeatherGuard protection for enhanced durability and resistance to the elements. Model Number: N100-875