Strong & Durable Steel Plates: Crafted from sturdy solid steel, this 1-second adjustable dumbbell weight is protected with polypropylene covers to enhance resistance against water and wear. The barbell handle, constructed from aluminum, further bolsters its strength and durability. Seamless Adjustment: Grip, Twist, Lift: Streamline your workouts with this adjustable dumbbell! Effortlessly switch between 16 weight settings with a quick twist (clockwise or counterclockwise) of the anti-slip handle. Clear mode dials make customization a breeze, ensuring you are always ready for the next set. 2-in-1: Dumbbell, Barbell: This genius workout equipment merges the dumbbell and barbell into one versatile free weight set.