Product Description This pocket door roller features four nylon constructed wheels. They come affixed to an adjustable spring loaded steel bracket. This assembly is for use on pocket doors 1 - 1-3/4 in. thick up to 100 lbs. each. From the Manufacturer This pocket door roller features four nylon constructed wheels. They come affixed to an adjustable spring loaded steel bracket. This assembly is for use on pocket doors 1 - 1-3/4 in. thick up to 100 lbs each.