This complete free weights package is specially designed for commercial gym weightlifting training, including cement dumbbell sets, adjustable kettlebells and barbell sets. Filled with high-density cement, these fitness gears feature stable weight balance, durable anti-slip outer coating and solid load-bearing structure, resisting wear and tear from long-term heavy use. Ergonomic grips effectively reduce hand fatigue during squats, bench presses, deadlifts and strength training. Covering full-body muscle building, fat loss and core workout demands, the integrated set meets intensive daily training needs of gyms, fitness studios and training centers, ideal for professional coaches and regular gym users of all training levels.