The HART Comp Kettlebells are all manufactured to the same size and specifications with the only difference being the weight. This allows users to progress up in weight without any technique changes. Handles are 3.2cm thick and made of exposed steel which is ideal for use with gym chalk so grip can be controlled. The large base makes a safer platform for push up type exercises. Colour coded for easy identification in the gym. Pack contains one kettlebell in each size, 8kg through to 24kg.