The drops from the monsters in Kerning Square

I checked up in Hidden Street about the drops of monsters in Kerning Square, and all have the same drops.

Common equipment: -
Warrior equipment: Traus, Blue Counter, Jacker, Zard, Sabretooth, Titan, Zeco, Crescent Polearm
Magician equipment: Hall Staff
Bowman equipment: Vaulter 2000
Thief equipment: Bazlud, Dragon Toenail, Steel Avarice, Blood Avarice, Adamantium Avarice, Dark Avarice
Pirate equipment: Neozard, Lunar Shooter

Is it true or it is just because they dont know them?