We extended our popular Dura-Bellô line of fixed dumbbells into the barbell market with Dura-Barô. Dura-Bar features the same high quality and durability as Dura-Bell. Dura-Barô fixed barbells have a patented design that makes them virtually maintenance-free. Hampton Fitness holds the U.S. patent on a round cylinder head that is screwed on the end of a solid dumbbell handle, then reinforced with a quarter-inch roll pin, through the head and the handle itself. Itís guaranteed not to come loose!