Developed a detailed SolidWorks CAD model of a spring-loaded osteoarthritis (OA) knee brace based on a commercially available device from Spring Loaded Technology (Dartmouth, Canada). Individually modeled multiple components and integrated them into a complete assembly using appropriate mates and constraints. Material properties consistent with the real brace were applied to accurately represent component behavior. The model replicates the mechanical structure and joint interactions of the brace, demonstrating proficiency in CAD modeling, assembly design, and mechanical system understanding.