1957-59 Chevrolet GMC Truck Front Drum Rear Drum Rubber Brake Hose Kit This is for trucks with factory drum brakes. This is for the 3100/3200 1/2 ton 3/4 ton but may fit many others. 4 Wheel Drum Brakes They are the correct length, with the correct size ends with the correct stop ring at the frame ends. These hoses also feature bright white dot lettering just like the originals. These hoses run from the frame to the wheel cylinder or caliper, to transfer fluid from the hardline to the hose. They flex up and down with suspension travel. These are usually dry rotted ,cracked and unsafe.