The Benchmade 670 Apparition Buffalo Horn Osborne 154Cm Blade Assisted Opening Knife. This discontinued Benchmade Apparition is an automatic assisted knife- you give the thumb-stud a push and the knife takes over rocketing the blade open. The knife comes with instructions on how to convert the knife from auto-assist to a manual knife (and vice-versa). Great collaboration by Pardue & Osborne. It’s a sight to behold. True vision, though, comes in the Optimiser® mechanics. You control its destiny. Inject the spring rod and it’s blade appears quicker. Drop the rod, things return to normal. You choose the blade speed.