Tri-Guards Corner Protectors: Lexan® gives them an edge over the competition. Corners aren not just places where walls meet: they are places that meet with a lot of abuse. With Tri-Guards in place, however, traffic-related damage comes to a halt. Made of Lexan— the near-indestructible polycarbonate plastic used in car bumpers, among other things— Tri-Guards are easily installed in minutes, and are guaranteed to last for years without cracking, chipping, warping, or yellowing. Mounting hardware is included. Maintenance is a simple soap-and-water operation. All things considered, Tri-Guards deserve their place as America's best-selling brand of corner protectors. Invisible good looks are a Tri-Guards trademark.