锏 鐧 jian3
ancient weapon like a long solid metal truncheon

strokes 20
radical
钅
金
strokes after radical 12
撒手锏 撒手鐧 sa1 shou3 jian3
(fig.) trump card

杀手锏 殺手鐧 sha1 shou3 jian3
(fig.) trump card