The KA-BAR Spork, which is made from food and water approved Grilamid, is equipped with a fork/spoon combo and has a 2.5" plastic serrated knife in the handle.  The knife is accessed by pulling the spork in opposite directions from each extreme end. Hint--avoid gripping the flat panel area in the middle of the Spork--this is actually part of its lock. The tighter you hold here, the more difficult it will be for you to pull out the knife! The Spork is 6.875" overall and has a blade length of 2.5".  It weighs 0.1 lb.