The Athletic Works 40 lb Adjustable Vinyl Dumbbell Set is an effective workout choice for both beginners and advanced fitness enthusiasts. The 14 piece set comes with two tubular steel bars, four 7.5lb plates, four 2.5lb plates and four spring clip collars for securing cement-filled plates. Simply slide the needed weight plates onto the ends of the bars that will best challenge your fitness level and goals to help improve your strength, confidence and health. This dumbbell weight set, 40 lbs is designed to develop strength and definition in arms, shoulders and backs.