Prime-Line Single 1-1/4 In. Steel Ball Bearing Roller, U-Back Style, Adjustable

This is a U-back patio door roller assembly with a 1-1/4 in. concave or grooved steel ball bearing roller in a stamped steel U-back style housing. When installed the U-back housing is drawn tightly into position against the side stile as the mounting screw or bolt is tightened. The housing is 25/32 in