M20 x 1 S.P.

  Genuine Guehring M20 Spiral Point (Chip Breaker) 
  1mm Metric Fine Pitch.
 
  Yellow Circle for General Use. 125mm O/A Length, 30mm Flute Length, 16mm Shank & 12mm Square Drive. Centres both ends
  Minimum use and absolutely pristine.
  HSS-E Absolutely top quality genuine Geuhring Quality.