20kg(44lbs) Adjustable Dumbbell , 5 Weight Ranges 6.6 to 44lbs, 1 Dumbbell = 5 Dumbbells, 5 Adjustable Gears for Different Weight, Rotate the Grip Bar to Add or Take Off Weight Plates, Clockwise and Counterclockwise Adjust the Weight, 8 Safety Locks Prevent Plates Falling Off , Only One Hand Operation More Convenient, Precise Plate Weight Better for Training