Bits with a Port or Spoon
Basically, a port is an inverted “U” in the middle of the mouthpiece on some bits. A very low port may appear to be only a slight rise, while a very high port can be quite high—over two inches in very high ones. A very low port allows room for the horse’s tongue and is sometimes called a tongue relief. Some snaffle bits have a port, but they are most commonly seen on curb bits. Some ports will also have a roller that connects the two branches of the “U”.