Stanley - Black and Decker Durable key ring feature makes it easy to take anywhere High Quality New Limited Lifetime Warranty 1/4" wide blade is polymer coated for added rust protection Durable key ring feature makes it easy to take anywhere Convenient and lightweight Mylar is a registered trademark of DuPont Teijin Films for its polyester film.Only Dupont Teijin Films makes Mlyar polyester film. Limited Lifetime Warranty