I have a feeling some reviewers suggest this machine a grinder, which allows you to clear away concrete. When the machine stops in the use, how about a little less pressure. The device works, one (s) or woman can buy it soothes. I think the weaker engine power was deliberately chosen by the manufacturer to protect the user against health damage. Imagine a time before, a user would be ground through the nail, the cornea into the flesh, then the cry would be great and everyone would yell "product liability".