Prime-Line 1-1/4 in. D X 0.75 in. L Steel Roller Assembly 1 pk

This is a unique housing patio door roller assembly. It is 3/4 in. wide and 2-1/8 in. long with a 1-1/4 in. diameter steel ball bearing roller attached. To install, remove the screw from the back and insert the assembly into the bottom rail end. Replace side stile, insert screw and into assembly. As the screw draws the roller's backside tighter, the design causes the front end to rotate downward and the door to lift to the desired height. Used by Rolleze or Rylock.