Review (3/5): painful callous' and have grown tired of using a callous ...
This is VERY POWERFUL. After reading all of the other reviews, I knew to be careful when I first started using it but have been quite surprised at how strong it really is. There is a knob that allows you to slow it down, but even at it's slowest it is dangerous. I have many thick, painful callous' and have grown tired of using a callous shaver, so sought this as an option. Even when using the slow speed, I have hit skin and had it sting. No blood so far, but it would be easy to do. I cannot imagine a professional using this. I kind of skim each callous lightly as I go. It does smooth them out so it does what it says it will do. But, please, be careful using it!!!