Sporting Goods, Fitness and Recreation Equipment Design Junior Golf Club Set Exercise Equipment by Didi Jin The core objective is solving the mismatch between adult clubs and the biomechanics of children aged 3 to 12. Shaft lengths are graded 30 to 39 inches, face angles optimized to 15 to 53 degrees, adapting to height, arm span, and swing speed. The club head uses lightweight high performance alloy, the shaft carbon fiber composite, ensuring low CG with minimal weight. Ergonomically designed grips fit small hands, markedly improving swing stability, setting a new standard for junior golf equipment.