Made entirely from steel, Pro Grade Kettlebells maintain the same dimensions across the range. Rather than making a larger sphere for a larger weight, Pro Grade Kettlebells are a hollow sphere whose shell increases in thickness as the bells become heavier. Therefore, an 8kg bell has exactly the same dimensions as a 32kg bell, both in handle size and thickness, bell shape and distance between sphere and handle. This makes a massive amount of difference in terms of both technique and comfort. A smaller handle is less taxing on the grip, and the sphere of the bell rests far more comfortably on the forearm, rather than the wrist joint. Finally, a greater amount of the Kettlebell’s mass is located in the sphere itself, which means it will cut the air better as well.