As you are working on bows, hairpieces, and hair accessories for costumes and performances, consider replacing all of the slightly inadequate clasps and fixtures with alligator clips. The alligator clips are overwhelmingly user friendly and secure.
You can purchase a the clips via Amazon for a remarkably low price (50 Single Prong Alligator Clips with Teeth= $0.94 + $4.99 for shipping). The clips easily adhere to most materials and fabrics with a strong craft glue or hot glue.
Try them– it will make your life easier, and your hair pieces will be MUCH more secure on stage!