this review title is: something different and the content is: these bits work well and are compatible with all the nail drills i tried the bits are good quality and seem like they should last a long time as long as you do not abuse them the set has some unusual bit profiles that we found very useful especially for tighter spots or smaller nails the case keeps everything safe in one place and secure.there are other information for this review, one is this reviewer did not purchase it and the other is 0 people think this review is helpful.