NSN 5120 - 00 - 148 - 7917
Your wrench set was made for Uncle Sam, the military part number describes a 12 piece combination and open wrench set in a rollup. (vinyl,blue?)
The number doesn't seem to be associated with any particular piece of equipment, so it is probably just available for general maintainance....
Unfortunatly , the cage code, that would tell me who supplied the sets, comes up as a special code that means basicly it went to the lowest bidder(s) to GSA...
PS:Picassa won't show me the picture...
("Oops... there's nothing to see here. Either you do not have access to these photos, or they don't exist at this web address. Please contact the owner directly to gain access.")