Instead of buying multiple sets of training equipment, you can change this dumbbell into a barbell with a central connecting nut, thus meeting your different exercise needs. And it has various weight settings for you to choose from. With regard to your safety, the two anti-slip rubber handles can provide you with a safe user experience. You can buy it with confidence as this dumbbell pair’s weight plates are filled with concrete. The 2 steel bars also empower you to use it for a long time. To sum up, this is a great training equipment that can exercise many muscle groups of your body including arms, abs, shoulders, etc. If you are a fitness enthusiast, this is a must-have training dumbbell for you! 2 in 1 Multifunctional Dumbbell set: The package includes eight 2.5 kg weights eight 1.25 kg weights 2 connection bars, 4 spinlock collars and one barbell link. In addition to being used as a dumbbell individually, the 2 bars can be connected together to turn into a barbell. It is perfect for you to do different exercises. Anti-skid Handles: This dumbbell set has two rubber handles with an anti-slip texture and a curved design to help you grasp the equipment firmly and comfortably. In addition, there are 4 fastening nuts with thickened threads to prevent the weights from loosening, helping to give you a safe and worry-free workout. Durable and Sturdy Structure: The external part of the weight plates is made of high-quality HDPE material, which makes it wear and rust-resistant. Internally the weight is made up of a concrete-type material so that weight does not shift and helps with longevity. In addition, the steel bar is very solid, enabling it to hold multiple-weight plates. Health and Fitness: Weight training is easy for anyone to pick up. For anyone who wants to shape their body, burn fat, or build body strength, weight training with dumbbells is more effective than other exercise machines. No matter how old you are, it's never too late to start keeping fit. Easy to Use and Store: Take a few seconds to assemble your dumbbell set, then start weight training! This compact dumbbell set can be arranged as a single barbell or 2 dumbbells suitable for various exercises. The set can be taken apart and stored in a small space.