CFF Rubber Hex Dumbbell- 12lbs - (Single Dumbbell) CFF-FIT Rubber Hex Dumbbells feature durability that simply can't be matched; It resists cracking and fading while protecting floors and equipment Made from solid cast iron with a 6-sided anti-roll design and encased in rubber, this dumbbell is stylish as it is durable Heads are securely fastened with a uniquely designed pin mechanism that means this equipment is about as low-maintenance as it gets The ergonomic handle fits nicely in your hands with a soft knurling for grip; 12 Pound Single Dumbbell