This Review Title is Great for Nails not Callouses. and the content is: This seems to work really well for the cost.  I gave it 4 stars because the plastic housing around the bottom holding the attachments does not snap on tight which is frustrating.  The rechargeable feature is very nice.  It has plenty of speed to file nails but for heel callouses it would need to be more heavy duty..There are other information for this review, one is This reviewer did purchase it and the other is 1 people think this review is helpful.