A mace is a ceremonial club that uses a heavy head on the end of a handle to deliver powerful blows. These were highly effective against well-armored knights, as the blow from a mace is strong enough to cause damage without penetrating the armor. Unless it is a flanged mace. These were designed with protruding edges of metal used to penetrate armor. These were developed much later in the middle ages. They were quite common. Peasants, rebels, footmen, and cheap conscript armies used these. Do not make the mistake of having your knight use one of these unless it’s for ceremony. He can be trained in the use of maces but a man’s weapon was a symbol of status. (Funny how time didn’t change that lol.)
The morning star was a medieval club-like weapon that includes one or more spikes. All of these weapons are bashing weapons and when used can cause massive amounts of damage. This would not be a pretty sight, so remember that as you write.
The last of the club-like weapons is the maul and war hammer. It resembles a sledge hammer. In 1382, rebellious citizens of Paris seized 3,000 mauls from the city armory, leading to the rebels being dubbed Maillotins. The war hammer resembles a hammer and is used strictly for close combat.