If you want your grillz iced, after a while you'll notice that a lot of the styles begin to look the same. Sure, you can mix up the arrangement, but all of the studs are perfectly round cuts pressed onto the metal plating. And round cuts of gemstones mean that you can't squeeze too many onto the same area, limiting how much bling you can really cram in there. Pins fix that. Square cut diamonds squeezed onto a gold grill equals more bling for you and more jealousy for your friends.