Wrought Iron furniture has been one of the most popular and durable types of furniture for over 100 years.  It’s high strength and durability means this furniture sometimes gets handed down for generations.  Forever Glides were originally developed to replace the flimsy, hollow cup glides that most of this furniture was shipped with.  Those original glides, in many brands, wear out very quickly.  Replacing them with Forever Glides should yeild many years of durable, scratch and rust-ring free service.  Plus, they are the only glides that have the patented self-leveling feature! The reinforced web design with super super thick bottoms and sides is made from Delrin®, an extremely hard, slick and long wearing plastic.The neoprene “flex-cushion” foam conforms to leg and floor differences and the high-strength waterproof adhesive bonds glide and foam to chair. Use indoors or outdoors.