A drum brake kit typically includes several essential components the brake drum, brake shoes, return springs, adjusters, and wheel cylinders. Each part works in concert to provide optimal stopping power. The brake drum, which is a cylindrical housing, rotates with the wheel, and the brake shoes press against it to create friction, slowing the vehicle down. Over time, these components can wear out due to constant use, which is why having access to a drum brake kit can be invaluable for routine maintenance and repair.