Instructional model that provides an in-depth view of drum brake components and their functionality. Featuring a detailed cutaway of the back plate, brake drum, wheel cylinder, and brake shoes, this trainer reveals critical internal mechanisms, including hydraulic pressure dynamics, self-adjusting features, and emergency brake systems. Constructed with heat-resistant cast iron and high-quality steel, it allows for a comprehensive analysis of braking principles, self-energizing effects, and material properties, making it an essential tool for advanced automotive education and practical demonstrations.