Vintage Klein TL-29 style electrician knife with folding crate opener.  Extremely rare.  This is the only one that I've seen with a folding crate opener.  The crate opener is stamped "PAT APD FOR" and it also advertises the CS Ball Candy Company of Dayton Ohio.  The candy company closed its doors long ago but the building still remains.  The knife is in great condition but does have a small pin crack in the cover at the center pin on one side of the handle (best seen in the last photo).