Replace your old crap metal handles with these parts! I've undersized the pivot hole for the knife tang to use as a pilot hole for drilling out the actual size. Also included the soldiworks parts (please always do this for other people, the part files are more important than the .stl files) A higonokami is a type of folding pocketknife native to Japan. The knife has no locking system, but is a friction folder or “penny knife”, using the friction of the swivel or the pressure of the user’s hand on a protruding tang to prevent the knife from folding during use.Use small picture frame nails to mock up each layer. Clip the excess nail and peen the end over. it'll help to find the same size bolt for the pivot hole.