The CAP Barbell 40-Pound Dumbbell Set is an effective workout choice for both beginners and advanced fitness enthusiasts. The set comes with several weight plates that allow you to create different weight combinations with the dumbbells. Weights can be gradually added as the workouts intensify. Fully adjustable with four 6 lb plates, four 2.5 lb plates, 2 threaded solid dumbbell handles, and 4 spin-lock collars. Plates are made of solid cast iron construction with a baked enamel finish. Ideal for home use.