I didn't see anyone write about this product before but i came across this on Amazon and its absolutely amazing! Its a super smooth nail file. I've used hard metal ones to soft foam ones in the past but this product has nothing on that. generally the metal ones are good but i find that you have to do it multiple times to shape the nail but this file is super easy. its shapes it in just 1-2 runs and it feels super smooth running across. I've heard it pretty much lasts a life time as well!