3D Red Rhinestone Santa Hat Metal Alloy Nail Art Charm. These Santa Hats charms have tiny rhinestone accents on them. They are stunning. They are reusable and can be applied to natural or artificial nails. These decals can also be used to dress up other objects and other items. They are very easy to apply and can be done by a nail tech or even yourself. This is a great way to make yourself have a unique look all your own.