Robust Brakes has developed its name as a top manufacturer of heavy-duty Brake hardware kits with premium quality. The hardware kits from Robust are designed to endure for longer than the timing of your fleet's brake maintenance. Our hardware Kits surpass all OE standards and are tested in compliance with global safety regulations. For our 4515 Q and 4707Q kits, we utilize yellow zinc plating to guarantee longer cam roller life and an additional heavy-duty return spring to give these shoes 20% more strength. we offer a wide range of hardware kits that cover all applications.