R1 Concepts Semi-Metallic Series Brake Pads are specifically designed for colder climates and provide one of the best entry-level brake pads for most vehicles. Semi-metallic brake pads are composed primarily of resin and 30 to 65 percent metal, creating a strong, secure amalgam that will stand the test of time. Our Semi-Metallic brake pads are completely asbestos free, making them both safe as well as long-lasting. The resin and metal composition of these brake pads make them ideal for high wear situations - and the cost just can't be beat.