Various images of Arrow Instruments
  
      136. Amkkagji(Female horn ring for the thumb), Late Chosun Dynasty

External diameter : 3.8 cm
Internal diameter : 2.7 cm
Courtesy : Military Museum (Two on the left)
Museum of Hanyang Univ. (Two on the right)
Wore it on the thumb when pulling the bowstring
Female horn ring is used mainly in use of a soft bow(nonelastic bow)