25 lbs Adjustable Dumbbell, Fast Adjust Weight with Anti-Slip Turning Handle ...

Space Saving: You only need a single dumbbell, you can have 5 sets of dumbbell training experiences. Safety Structure: Double safety buckles on the tray and handle bar make this adjustable weight dumbbells can only be adjusted on the tray, the non-slip design at the handle ensures safety and stability during exercise after the dumbbell leave the tray.

eBay