This is a U-back patio door roller assembly with a 1-1/8 inch diameter 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 1/2 inch wide, 1 inch tall with a rear adjusting screw. Most often used by Better-Bilt patio doors.

• Used by Better-Bilt and a variety of other metal framed patio door manufacturers
• 1-1/8 inch diameter roller
• C-tab housing with rear adjust
• Steel housing and ball bearing roller
• The U-back housing is drawn tightly into position against the side stile as the mounting screw or bolt is tightened