3 pc NACHI  5/16” - 18 NC   4 Flute Bottom Taps; 911-64112; H5 ; HSS
  Three pieces in original plastic container. 
  OAL ~2 - 3/4”
  
Thanks for looking. Feel free to ask any questions. Please check out my other quality machinist tools. 

Always sent properly packed and tracking number given as soon as its sent.