I purchased this recently in order to replace a set screw that came out and was lost in a fixture.  This pack gives me probably as many set screws and as many different varieties as I will ever need.  The price was very fair and much easier than having to go to a big box home store and buy several different sizes of set screws, hoping to guess the correct one.  Then I would have to figure out what to do with the remaining screws.  This solves those problems.  Very happy.