The competition kettlebells are cast iron versions with a more precisely worked ballistic weight to bring their centre of gravity more to the centre of the ball. In addition, their handles are narrower to ensure better grip and less instability. Highly appreciated by competitors and high level structures.
WIIT hexagonal one-piece dumbbells offer the same advantages as their round counterparts, but avoid ground rolls (thanks to their 6 anti-roll faces). Ideal for when there is no flooring in your training space thanks to their hard rubber outer covering.