Free weights: a classic, tried-and-true way to train strength and improve cardiovascular fitness. And dumbbells are one of the most versatile additions to any exercise routine. These hex dumbbells are cast from solid iron and finished off with a hammertone baked enamel coating. Practically indestructible, no chipping, no peeling. Sharp hex shape prevents rolling and enables easy stacking and simple storage. Knurled handles provide extra grip when it counts.