Spencer Walcott Vinyl Sliding Patio Doors are constructed from low-maintenance vinyl. The frame and panels are welded at the corners during assembly to provide a product superior in strength, performance, and appearance. Reinforcement is used at the meeting rails and at the lock points of the frame and panel for added rigidity and strength. The sliding door operates smoothly on heavy duty steel tandem rollers and is secured with color matching die cast handle sets. The glide screen is made from heavy extruded aluminum framing, fiberglass mesh screening and operate easily on steel rollers.