Xu Collection, Upper Volume Radical: Metal (jīn) Duān Kangxi strokes: 17 Page 1315, Entry 13 Broad Rhymes (Guangyun) and Collected Rhymes (Jiyun) state it is pronounced duan. Jade Chapters (Yupian) defines it as to drill or to bore. In the work of Yangzi, Dialects (Fangyan), it is stated that to drill is called duan. The commentary notes it is pronounced duan.