Race-Driven Severe Duty Sintered Metal Brake Pads You will receive 2 sets of brake pads to replace the rear brakes on the following: 2006 Polaris Hawkeye 300 2x4 Severe Duty Brake Pads are the newest compound design by Race-Driven. They are a sintered metal pad that will far outlast any pad on the market, semi metallic, organic, or otherwise.