In addition to making mail (also called chain-mail), after the 14th century they began making plate armor. Armorers could also specialize in what type of armor they produced (mail or plate). They also specialized in various tasks involved in creating armor. For example a "fourbor" was a someone who polished armor. Armorers often belonged to a guild. Later there were guilds for mail armorers, plate armorers and for armorers who specialized in helmets.