Sog FF-01 Fusion Contractor. The Contractor 2x4 breaks ground with a whole different framework! One of the new breed of thematic knives originated by SOG, this knife is no apprentice. Open or close the blade and see the circular saw turn or rotate the saw and open the blade. Whether you are a contractor, know a contractor, or wished that you didn't... the 2x4 will help on the job... whatever that might be. How many times have you wished to sharpen a pencil without having to walk back in the house? Or try and get that picture level without a level? Want to strip a wire real quick? No worries. Use the patent pending strippers in the handle. Oh yeah , if you ever need that one last lucky nail, we have that too! What to do to drive that nail home ...we can't help you there, at least not yet.