Constructed by precision friction welding and built using highly durable shock absorbent rubber, the Overdrive rubber hex dumbbells are built to last and made to withstand heavy workout drops. They feature a fully straight medium depth knurl handle that provides better contact between your palm and handle and gives you that “barbell grip” feel. This means a firmer and more comfortable grip no matter where the hands are placed. The hexagonal shaped heads provide a solid base that prevent the dumbbells from rolling during workouts and the heavy duty rubber will minimise noise while protecting your floors and dumbbells from wear and tear.