@sodah This manga has various equipment classes (or types), which shouldn't be confused with actual weapon names. Examples of equipment classes could include but aren't limited to 1-handed sword, 2-handed sword, shield, hammer, staff, wand, shoes, light armor, heavy armor, gloves, helmet, ring, earring, bracelet, necklace, etc. The basic idea of course is that certain classes are more proficient with certain equipment types. You wouldn't give a wizard a 2-handed sword and you wouldn't give an explorer a wand.
Hammer class includes anything that uses centrifugal momentum to cause impact bludgeoning or spike damage. Generically and not specifically to this manga, this could include clubs, maces, morning stars, war hammers, flails, etc.
1-handed sword class could include any bladed weapon that is designed be wielded in one hand. This could include the longsword, short sword, dagger, katana, wakizashi, rapier, cutlass, sabre, shotel, jian, dao, kopish, etc.