Andersen Bottom or Top Hinge Track Replacement is a replacement part for E-Series Casement Windows with Standard Hinge. It is used to replace a damaged or worn-out hinge track on the bottom or top of the window frame. The replacement process involves removing the old hinge track, applying sealant to the screw holes on the frame, and then installing the new hinge track using the saved screws. The replacement hinge track helps to ensure that the window sash operates smoothly and securely within the frame.