ProMax Brake Shoes are manufactured with all new steel webbing, no recycling or remanufacturing, and are riveted or bonded where applicable. All Drum Bake Shoes, Emergency Parking Brake Shoes and  Drive Axle Parking Brake Shoes are manufactured using an NAO formulation. NAO materials are copper free and offers noise free performance while helping extend brake drum life. All Brake Shoes are cam ground to ensure perfect fit on brake drums while releasing dust build-up. Noise and performance tested at Link Engineering.