Synco Rubber Coated Dumbbell Pair (2 x 2.5 KG)These Synco Hexagonal Shape dumbbells are made of pure strong Steel and heavy rubber. it increase buffer and friction, protect the floor or rack Thus, they have a long life to serve you. Synco dumbbells are designed for firmed tighten upper body, improve core muscles strength, shape and tone arms, back, shoulders, heavy workout. Some use full for men, women, home gym workout and Commercial. beginner also can use it. Even professional body