great mini size grit does not last long [SEP] prosthe patterns are eh some suck and some are decentcons the grit wears out very quickly faster than a regular cardboard foam emery board that sucks i was hoping that the glass version was an option that would be more durable and last longer but sadly it is not i would say within a week i had worn both sides down on at least of these so it is now just smooth glass in those spots i was willing to make an investment on something that was longer lasting and potentially more eco friendly than buying the cardboard foam ones all the time but i will have to go back to the cardboard foam ones until i find something more durablethere is no way that throwing away that much glass every weeks is better than using cardboard foam