This is shown in the menus for selecting a weapon. As we know, FFXV's weapons have a RANK which determines how powerful a weapon is. You are more likely to keep weapons in this game due to their functionality. Weapons in this game can also grow as well with abilities.
This section here is showing the categories that you can scroll through to equip a weapon.
Sword, Greatsword, Lance, Knives, Gun, Shield, ????, Sub-weapon, Magic(?)
I wonder what the weird cog like thing is supposed to be.