FEIERDUN Adjustable Dumbbells, 20/30/40/45/70/90lbs Free Weight Set with Connector, 5 in1 Dumbbells Set Used as Barbell, Kettlebells, Push up Stand, Weight Plate, Fitness Exercises for Home Gym Suitable Men/Women4 in 1 Multifunctional Dumbbell SetWith it, you can get a pair of dumbbells also barbells, kettlebells, and push up stands, which help you do many exercises including bench presses, squats, etc. Durable MaterialsEnvironmentally dumbbell pieces exterior is made of high quality PE materials, and the inside is mixed with iron, mud, and sand, which effectively prevents floor abrasion. 20MM Thickened FoamThe connecting rod is made of a 5mm thick steel tube