Adventure Piggyback Fixed Blade Knife. The Johnson Adventure "PIGGYBACK" is a convenient personal size one piece stainless steel constructed knife with skeletonized handle measuring 6" overall with a 2 5/8" blade. This personal size knife can be worn as a neck defense knife concealed underneath a shirt or it can be carried within the stuff pouch of the Bacon Maker model 5601 or the Potbelly model 5600 sheath as a tool for fine or delicate work. The blade of the Piggyback has been flat ground sharpened providing a strong cutting edge. Knife comes with a friction release black neck sheath with hanger ring.