Material Stainless steel, Plastic Sport Type Strength Training/Exercise and Fitness CHEST EXPANDER - Our 5 Spring Chest Expander is the perfect piece of equipment for conditioning your upper body muscles such as chest, shoulders, biceps and triceps. This kit includes 5 adjustable resistance springs so you can easily set the tension levelto suit your workout. 5 SPRINGS - With 5 adjustable resistance springs available your will be able to work your muscles form almost any angle. The offers varying levels of resistance and allows you to easily and comfortably suit your exercise routine to you BENEFITS - Primarily the chest expander will build and strengthen your pectoral muscles but it can also provide excellent workouts for your biceps, triceps, shoulders, traps, deltoid and upper back muscles FULL BODY WORKOUT - By looping one handle around your foot and holding the other with your hand, you can also get a good workout for your legs. You can get the perfect full body workout as the potential of the chest expander is only limited by your imaginationand flexibility GREAT EXERCISE - Chest Expanders offer many advantages over traditional weights. The cables of the expander offer a constant and steady resistance so you can easily work out all your muscle groups without additional strain or risk of injury