Sporting Goods, Fitness and Recreation Equipment Design Junior Golf Club Set Exercise Equipment by Didi Jin Junior Golf Club Set is a golf equipment set designed for children aged 3 to 12. The set addresses the mismatch between scaled-down adult clubs and the biomechanics of young players. Shaft lengths range from 30 to 39 inches and face angles from 15 to 53 degrees, matching height and swing speed. The club head is precision cast from 7075 aluminum alloy for a low center of gravity, and the shaft uses carbon fiber composite. Child-sized ergonomic grips reduce fatigue and support stable, consistent swings.