This multi-purpose knife from Diamond Superior is a versatile tool that can handle a variety of tasks. This is model K 5017 which seems to be rare.  Lots of K5011's out there, but don't see any K5017's.  Also, lots of red handles, but not many black.   The tools are pretty amazing and seem endless when you start opening them all up.  Zoom in to see them all!  Hope you need this one for your collection.