Disclaimer: This post is based on a free product provided by a company as a press sample so that I may offer my own opinion, which may be the same or differ from yours.
Manually sanding that rough skin on your feet can take a while. Otherwise, you can end up with pain. However, the Emjoi Micro-Pedi Nano is a battery-operated tool that uses a gentle roller type of buffer to rub away that hard, calloused skin. After I put in the two AA batteries, I just held it without exerting any pressure and ran it over the bottoms of my feet.
This tool was easy to use, painless, and so much quicker than a daily attempt at doing the same thing by hand.
You will have to buy refills later on to keep it sanding, which I don't mind at all after using this.
*Disclaimer: This is my own honest opinion. A free product was provided solely to facilitate this review.*