M4.0 X 0.70Mm Pitch Full Profile Guhring I.D. Thread Rh System 104 Insert, 17Mm Reach, Nano-A Coated M4.0, 0.70Mm Pitch, 17Mm Reach Gg104.Vm04.070.17.31.R, Nano-A Coated Type Gg104 Guhring Micro-Precision System 104 Carbide Stick Insert With 4Mm Quick Change Shank For Full Profile Metric Threads. Guhring Series No. 25166 Order Code 4.009 Made In Germany, Guhring Part #9251660040090 Guhring Inc.