What a great idea! When creating a new piece or doing a prototype having a full set of jump rings organized and on hand allows you to select the proper one and experiment for the best choice. Once you’ve gotten it how you want it, the box is labeled with the order numbers and you’re ready to go. Otto Frei offers these in heavy, medium and light weight kits; I recommend you purchase all three. Saves quite a bit of time for those of us who can’t identify a jump ring size and weight by sight.