I bought 5 of these when I started building and sorted all my rivets, screws, and fasteners in the bins labeled with a label maker. All are placed in order by item type and progressive size. Whenever I run low on an item, I make a running list of what I need to replenish and place an order when I am almost out of an item to save on shipping. If I need washers, I order a bag of 100 for the discount. I generally do not re-use small fasteners and replace with new shiny ones in final assembly. I throw the used ones in a separate bin to sort through in an emergency, or to use for other projects.