The Aztec Road System Brake Blocks are replacement brake block system for road brakes. Road Insert pads are made from Aztec\\\'s finest braking compound offering you great braking power and durability in all weather conditions. Anodised aluminium alloy pad shoe. Brake pad inserts are held in securely by screws. Simple slide out and slide in pad replacement. Proven Aztec groove system helps clear water and dirt from the pad surface. Supplied complete with one set of alloy rim compatible pad inserts.