This is a 6 piece Benchmade knife set that can be seen in a couple different episodes. The set includes one sharp hero, one dulled aluminum, one blood blatter variant, and three foam rubber stunts. This particular knife can be scene in the sequence when Lumen cuts Dexter and also used as a kill knife by Dexter in season 7 episode 2. There may have been other episodes where it was used as well, but those are the only two I know for sure.
