M16 x 2 X-Length Straight Flute Semi-Bottom DIN 376 Small Shank Tap, D7/D8 , HSS-E (Cobalt), TiCN Coated, Coolant Fed Type: Black/Red/White,Number of Flutes: 3,Hole Type :Blind Hole 160mm Overall Length, 12mm Shank Diameter, With Axial Coolant Through, Chamfer Form C: 2 to 3 Lead Threads Series No. 779, Order Code 16.0000, Guhring Part #9007790160000