4 in 1 Multifunctional Dumbbell SetWith 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 MaterialsThe 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 BarThe 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 NutsThe dumbbell set contains non-slip fastening and thickened nut threads ensure a secure fit wit