M27 x 1.5 Yellow Ring Spiral Flute Semi-Bottom DIN 374 Small Shank Tap, HSS-E (Cobalt), D7/D8, Bright Finish Type: Yellow Ring,Number of Flutes: 4,Hole Type :Blind Hole 140mm Overall Length, 20mm Shank Diameter, Without Coolant Through, Chamfer Form C: 2 to 3 Lead Threads Series No. 834, Order Code 27.0070, Guhring Part #9008340270070