Rhino USA D Ring Shackle Isolators include washers and fits any standard ¾” d-ring shackles. Our D-ring isolators are designed to prevent loud metal clanking and rattling against your anchor point while on the road and to prevent paint chip and wear. Rhino USA's shackle isolators are made with heavy duty polyurethane material for long-lasting durability and protection and come in different color options to match your vehicle. D-ring shackle isolators are essential to keeping your d-ring shackles in perfect condition. Rhino USA is a small, family business founded by a father and his two sons from Temecula, CA, offering a 100% lifetime warranty on all of our products.