The parking brake is a brake method used to hold one or more brakes continuously in applied position. The parking brake employs the usual drum brakes on the rear wheel. Instead of hydraulic pressure, however, an easy mechanical linkage is used to engage the brake shoes. When the parking-brake pedal is very depressed (or, in some cars, a hand lever is raised), a steel cable pulls taut a tension lever; additional cables draw the brake shoes resolutely against the drums. The release knob slackens these cables and disengages the brake shoes. The parking brake is nature adjusting. An automatic adjuster in the piston moves on the thrust screw to recompense for lining wear.