Nail Removal in Round Favour Box

[Maruniginuki] Nkuginuki-mon/◇│ A long, old, non-existent carpenter's tool that uses the principle of teko, consisting of a nail-shaped washer and a lever. It is also called Senkin, Manriki, or Kuki, and it is said to have the power to attack and conquer nine castles, and it was used as a family crest for military good luck. (Kosaku ITO "Nihon no Monsho" (The Emblem of Japan)): It was used not only by relatively many daimyo (Japanese feudal lord) and samurai under his command, but also generally used as a pattern of happi (a coat of law) for slaves and servants, but it is not clear what the reason it was based on (Yorisuke NUMATA's "Nihon Monshogaku")