Hampton Pro-Hex Dumbbells - Pairs Turned down ergonomic grip from 35mm stock unlike others who cast at 25mm Unlike others make entirely of cast iron that increases the chance of the head breaking from the handle With Hampton's fish tail molding process, safety is critical yet unseen With a baked enamel finish, the Pro-Hex dumbbell has the toughest and most durable exterior coating in the industry Original Hampton design to be the first in the fitness industry to add an ergonomic-style grip to traditional hexagonal dumbbells