Details: Just focus on muscle building with your new dumbbells. You could do squats, dead lifts, curls, floor presses, shoulder presses, triceps extension, etc.15 minutes of exercise with dumbbells will far exceed other sports for half an hour. It is great for both upper and lower body workouts, which helps tone and sculpt your arms, shoulders, back and also strengthen your muscles. With this dumbbell set, you can exercise at home, in the office or any place at any time. Lose weight? Shaping? Gain muscle? it is a perfect tool! Features: The adjustable weight dumbbell s a 2- in -1 weights set and quick conversion between dumbbell and barbell,which can be used as a dumbbell and barbell lifting. Use as barbell lifting just need to use connecting rode to link two sides dumbbell together, or remove the rod to use as dumbbell, the weight depends on the weight plate you add. Foam covered connecting rod to reduce neck s compression and relieve fatigue; Features with comfy PVC grip to prevent slipping and pertect your hands effectly when exercising; Octagon shaped dumbbell plate covered with plastic to prevent scrolling and for easy storage, with no damage to floor; Special locking nut design, there is a corresponding slot between the nuts. When you tighten, the nuts will fit tightly and prevents you from the risk of weight plates falling off during the workout. Comes with different sizes weight plates to adjust to your desirable dumbbell weight. Material: cement mixture, polyethylene and EVA resin