My father and I normally use a lot of cross bits around the house, especially the very important #2 size. #2 is the most common crosshead size. So if you only have a cross drill at home, you probably need this size. This set of 10 is a very good deal and will save you a lot of frustration (if you've ever spent half an hour searching your entire property for a usable crosshead, because that's all that stands between you and the completion of the project , you know what I'm talking about). ). These bits are durable and won't chip or round off as easily as the cheaper ones. Another high quality and reliable product from SNUG.