Centuries ago, if not millenniums, the warriors used a similar version of this special hammer for their core strengthening. And even nowadays we use its improved versions in either home gyms or bigger training centrums. The main and most important characteristic is in the weight distribution – the round top carries the most weight, hence core stabilizers and body’s rotational power are en-larged. For a favorable price you get a tool that can be used for squats, lunges or press.