I have a few "miscellaneous" cases of bits - and it's always the smaller sizes that break. So I had a variety of packs in just large sizes (and very small sizes because I never use them). With this kit I was able to replace 3 bits in each pack that were broken. The only downside is that some of these sizes are REALLY small - I guess they include them to increase the bit count, but they're really useless for any practical use. I have. I would happily pay the same price for only 3 plus sizes in this set because I now have a lot of mini attachments for my heirs to deal with.