1. Metal accessories
As you know, you are going to have to walk through a metal detector before you board the plane. And as the name suggests, the device will sound an alarm if you have any kind of metal on you.
That’s why you shouldn’t wear bulky jewelry, lapel pins, hair accessories, or belts with metal clasps to an airport (security agents might ask you to remove your belt even if it doesn’t have any metal part). If you do, you will have to remove them and it will definitely delay the whole process.
Most metal detectors are calibrated to ignore small amounts of metal, so if you have a gold wedding ring, a small piercing, or gold filling in your teeth, you most likely can keep them while going through security. But keep in mind that if the alarm goes off, you will have to undergo additional security screening.