【4 in 1 Multifunctional Dumbbell Set】With The Trakmaxi Adjustable Dumbbell Set, you can get a pair of dumbbells also barbells, kettlebells and push-up stands, which help you do many exercises including bench presses, squats. A complete set of dumbbells perfect for presenting the home gym. 【Ergonomically Durable Materials】The Environmentally dumbbell pieces exterior is made of high-quality PE materials, which prevents floor abrasion,Safe and secure, soundproof. Contains concrete formed by a mixture of cement and iron sand, which effectively guarantees zero leakage and real weight. 【Non-slip Dumbbell Bar】The connecting bar is made of 6mm thick steel tube + 20mm thick high quality foam. Ergonomic design curved design fits your neck, non-slip and sweat-absorbent, soft and breathable, its curved shape fits your neck perfectly and increases the comfort level. 【Upgraded Safety Nuts】The dumbbell set contains non-slip fastening and thickened nut threads ensure a secure fit with the dumbbell or barbell bar, effectively keeping the dumbbell pieces secure. Keeps you safe in use. Smooth fingertip grip ensures quick and easy mode switching. 【More Weight Options】Dumbbell piece with removable design, single dumbbell adjustable weight range of 10 pounds, to meet your needs of different stages of exercise intensity. It is easy to install.Included in the Set: Weight Plates ( (2+2.75) lbs *4, , Dumbbell Handles *1, Barbell Conncecting *1, Kettlebell base rod *1, Dumbbell bar*2，Spinlock Collars *4. 【Brand Support】Trakmaxi always due to providing our customers with the best service. If you have any need help, please feel free to contact us. We will reply as soon as possible and try our best to solve your any problem, please feel free to contact us, we will respond within 12 hours.