A brake adjuster kit is a key component in drum brake systems, designed to keep the brake shoes properly aligned and at the correct distance from the brake drum as they wear over time. This ensures consistent brake performance and reduces the need for frequent manual adjustments. The kit typically includes an adjuster screw (also known as a star wheel), a lever or actuator, return springs and related hardware. When functioning correctly, the adjuster mechanism either automatically or manually compensates for brake shoe wear, helping maintain effective braking response and pedal feel. A worn or seized adjuster can cause issues like excessive brake pedal travel, uneven braking or reduced stopping power. For optimal safety and performance, the brake adjuster kit should be inspected during regular brake maintenance and replaced if any of its components show signs of wear or corrosion.