Hello! I am not sure what the notion is called, but I believe the gadget is made by Clover - it is round and ornamental and is used to cut threads. You can add a chain and wear as a necklace OR put it in a spool of thread; I use it for clipping pieces that are chained pieced. I love it for that - have my spool of thread with cutter by the ironing board or machine and use it everyday!