DIN 338, fully grounded,135 split point, material : HSS M2, polished 1/16,5/64,3/32,7/64,1/8,9/64,5/32,11/64,3/16,13/64,7/32,15/64,1/4,17/64,9/32,19/64,5/16,21/64,11/32,23/64,3/8,25/64,13/32,27/64,7/16,29/64,15/32,31/64,1/2