For superior friction retention even in the most demanding applications, each DFC Premium Brake Shoe goes through a unique and stringent glue lining and heat treatment process to ensure the friction material bonds well to steel. This process helps minimize friction lifting and delamination, which are the usual causes of vibration, noise, rust-jacking, and premature friction material breakdown. After bonding the friction material to steel, the DFC brake shoe is then precision arc ground to ensure a perfect shoe-to-drum fit. Levers and pins are provided (where applicable) for a secure attachment. All DFC Premium Brake Shoes undergo rigorous field and lab testing for guaranteed reliability and long-lasting performance. They are also backed by a 12-month or a 12,000-mile limited warranty against defects in workmanship and material.