York Barbell 34009 Pro Hex Dumbbell with Cast Ergo Handle, Grey, 25 lb Handles are hydraulically pressed, creating a "fishtail" steel handle end Handles vary from 30 mm grip for increments through 20 lbs., increasing to a 35 mm grip for increments 25 lbs through 100 lbs he softened edges of the heads improve paint durability and adhesion