Various images of Arrow Instruments
  
      137. Suskkagji (Male horn ring for the thumb), Late Chosun Dynasty

Length : 4 - 4.2 cm
Internal diameter : 2.7 cm
Courtesy : Military Museum (One on the left, one on the right)
Museum of Hanyang Univ. (Three in the middle)
Male horn ring is used mainly in use of a strong bow(elastic bow)