Ofc its useless, I mean, Shoulder of the [SIZE="3"]Shoulder[/SIZE], for what the HELL it could be useful for, if theres something like it. 
The staff of Nexon were probably like:
"Hey, do you remember what this strange black item should be used for??"
"uhm.. let me see *Reads the info* *LOLS*"
And that way the staff forgets to implent the shoulder of the shoulder in the game. End of story.
The staff of Nexon were probably like:
"Hey, do you remember what this strange black item should be used for??"
"uhm.. let me see *Reads the info* *LOLS*"
And that way the staff forgets to implent the shoulder of the shoulder in the game. End of story.