Kettlebells? They have a longer history in America than you might think… Case in point, this “Strength Maker” kettlebell, was produced by Professor Anthony Barker around 1910 or so. The “Strength Maker” was a set which consisted of two hollow globes and various handles. Depending on what you wanted to train with, you could screw in a short handle to make a dumbbell, a long handle to make a barbell, or the handle shown above to make a nifty pair of kettlebells. The globes were hollow and weight could be adjusted with shot as needed.