Please note you will be redirected to another site to purchase. Competition kettlebells are made of steel and are all the same size regardless of weight for a uniform training experience at all times. These competition kettlebells have 35mm handles. The bells are designed for high repetition exercises. If you have used barbells, think about when you train with plates that are all the same size regardless of weight so your form is always the same during Olympic lifts. Competition Kettlebells are the same premise in kettlebell form.