Anti-slip Grip The medium-depth knurling on the contoured chrome handle provides essential grip and security during usage, so your hands will not slip when sweated. Anti-roll Design These hexagonal-shaped dumbbell heads prevent rolling on the ground when you put them down to perform other exercises. It is stable and safe. Rubber-coated Iron is rubber coated to protect the dumbbells and your floors from damage and keep quiet when you work out. Rubber-coated heads are securely press-fit and friction-welded to the handle. Versatile & Functional Dumbbells are perfect for functional training and workout. Any time, and any place, you can use dumbbells to do specific muscle strength training and get a full body workout