METRIC BLACK OXIDE HEX KEYS CODE FASTENER SIZE LONG END LENGTH SHORT END LENGTH 84318 12 MM 209 MM 44 MM 84320 14 MM 232.5 MM 54.5 MM 84323 17 MM 246 MM 61.5 MM 84325 19 MM 275.5 MM 68.5 MM 84328 22 MM 330 MM 78 MM