After I had neglected for years and ignored the pedicure I needed something stronger now to me to dispose of "contaminated sites". Something like MicroPedi & Co. is well and good, but does not help much with heavy cornea. With a rasp I have hurt me, and you can thus perform poorly evenly. This planer is just right in my eyes, to remove gently but still effectively increased cornea. The fact that on both sides, both the coarse and the fine grain he will keep you safe long, stable he is anyway. So far the best thing I've found for my purpose. For the price you can not really go wrong.