As a result of my tests, i determined that this so-called `Hammer Holder' is nothing but a joke .It's poorly designed, made of cheap materials that easily break and does not hold the hammer properly. As an industrial and scientific worker I expected a sturdy and reliable holder. The only pro, if there is one, is that the product arrived on time. The cons are bottomless, including its uselessness which is a deal-breaker. Do not waste your time and money on this pathetic excuse for a tool..