Never bring only a knife to a gun fight, but having a spare knife is always handy. Part of the Western Costume Set, obtainable from the GoCash East West Costume Box.
West Costume Set :
Costume Cowboy Hat
Costume Zorro Mask,
Costume Dagger in Mouth
Class: Costume
Location: Upper
Defense: 0
Weight: 0
Required Level: 1
Jobs: All