Adjustable dumbbells are a type of weightlifting equipment that allows users to easily change the amount of weight they are lifting by adjusting the plates on the dumbbell. This makes it convenient for users to perform a variety of exercises without having to switch between multiple sets of dumbbells. Adjustable dumbbells are typically made up of a handle and a set of weight plates that can be added or removed as needed. Some adjustable dumbbells use a dial or locking mechanism to quickly change the weight, while others require manual adjustment by adding or removing plates. These versatile pieces of equipment are popular for home gyms or small workout spaces, as they take up less room than a full set of traditional dumbbells. They are also cost-effective, as they can replace multiple sets of dumbbells and grow with the user as they progress in their strength training. Overall, adjustable dumbbells are a convenient and efficient way to incorporate weightlifting into your fitness routine.