this review title is: i have tried the drills that have batteries in the body of the drill and the content is: and while they do not seem to be bad they just do not have the power that this one does i am thinking it has to do with the size strength of the battery in the drills attached power supply while i do use this for my fingernails i am using it more for my toenails and feet toenails are thick and tough and i have trouble cutting them well even with good toenail clippers so being able to file them a little at a time is much easier also i have some very hard thick skin on my feet and grinding that skin down is much easier that using a foot file this is a wonderful nail drill that is not just for nails sturdy like a workhorse it will make short work of messy nails or hard callused skin.there are other information for this review, one is this reviewer did not purchase it and the other is 1 people think this review is helpful.