WTB: guitar truss rod wrench for prs/gibson (5/16")

[mrekoj]

looking for something like this

http://www.stewmac.com/shop/Truss_rods/Wrenches,_hex_keys/Pocket_Truss_Rod_Wrenches.html

pocket or bigger than pocket doesn't matter, as long as can get the job done.

cheers