Product Details: Update your semi truck with enhanced control of its parking mechanism, with the Bendix 5/8" MV-3 Parking Brake Knob that ensures you're Ready for the Road Ahead™. Thanks to its simplistic design, this replacement knob allows operators to quickly apply or release the brakes from inside a vehicle's cabin. Fashioned with premium-quality materials for long-term durability. FleetPride is your First Click in Heavy Duty®.