Robalon material is salt, Age & wear resistant, lasting up to five times longer than painted steel skid shoes and up to four times longer than stainless steel or molded plastic skid shoes. & because they aren't made from steel, rust spots from old skid shoes on garage floors or scrape marks in driveways, sidewalks & patios are now a thing of the past. So lose the rust, save some money & help preserve your driveway This winter with a new set of Robalons!