The lightning-fast adjustable dial mechanism lets you switch between 15 different weights from 5 lbs to 52 lbs. The compact design of the dumbbells makes them easy-to-store and use at anytime, anywhere at your home. Made from the highest quality materials that do not rust, last longer and are more durable than the average dumbbells. The ergonomic design with superior rubber grip and high-quality interlocking system makes the shifts very smooth and easy. Can be used for a variety of exercises and adapts to your increasing fitness levels.