【DUMBBELL TO BARBELL】This Dumbbells set can be connected by a connecting rod and become a barbell to meet the needs of upper and lower body workouts, which helps tone and sculpt your arms, shoulders, back, chest, and leg. This new dumbbell concept allows you to do both dumbbell and barbell training movements to build your muscle at home or office.【HIGH QUALITY & PATENT DESIGN】The dumbbell bar which covered with a rubber coating ensures a comfortable and non-slip grip. Weight plates made of steel and cement mixture and covered with environment-friendly ABS shell. Patent design texture makes it unique, better grip, not easy to aging.【DOUBLE LOCKING NUTS】Special double-locking nut design, there is a corresponding slot between the two nuts. When you tighten, the two nuts will fit tightly and prevents you from the risk of weight plates falling off during the workout. This design makes dumbbells like an entirety, giving you a more comfortable feeling when you do chest press or dumbbell row.【SUITABLE FOR HOME GYM】For people who cannot go out or want to exercise at home, this dumbbell set is the best addition. The 44lbs weight plates and the switching mode of dumbbells and barbells allow you to get the same exercise intensity as the gym at home. If you have no idea about how to choose the gift to your close fitness lover, this dumbbell set is a great option.