PATENT WEIGHT ADJUSTABLE DESIGN: Nice C adjustable dumbbells come with removable weight bars that allows you to set your desired weight. The ends of the dumbbell can be opened and weight bars can be either added or removed upon your preference. This allows you to efficiently use one set of dumbbells for many exercises instead of buying multiple sets.COMPREHENSIVE EXERCISE SET: Unlike most dumbbells that require multiple purchases for different weights, this all-in-one dumbbell allows you to have a versatile workout. These dumbbells can be used to sculpt your arms or tone your back. This product is perfect for improving overall health or encouraging weight loss. It can also help strengthen your upper body or core. The adjustable design makes it easy to stay fit at home. MULTI-WEIGHT SETTING: Weight bars are included to allow you to adjust the weight of your dumbbell. There are 4 weight blocks total for each dumbbell. Each weight bar weighs 0.55 lbs. In order for the sides to be even, you must add them equally on each side. NON-SLIP SAFE DESIGN: The slip resistant Neoprene allows you to feel safe and be worry-free while doing your workout. Both the Neoprene and upgraded curve-shaped handlebar allows for a better grip so you can improve your coordination and avoid any injuries or accidents. This simply designed dumbbell can be used to strength train and to build your muscles in order to keep healthy and avoid muscle atrophy. PREMIUM QUALITY: Your satisfaction is our priority which is why we make sure that every product you receive from us is made with high quality raw materials and is defect free. Our Adjustable Dumbbell Set comes with a 30-Day warranty for manufacturing defects. Your purchase from us is risk free. Please contact us if the product you purchased from us has failed your expectation. Our customer service will try our best to respond quickly and efficiently.