4.0Mm Min Bore Guhring Bore/Profie Rh Wiper System 104 Insert, 0.30Mm (T-Max) Offset, 12Mm Reach, Nano-A Coated Right Hand, 0.20Mm Radius, Tialn Coated Gj104.2337.020.12.40.R, Nano-A Coated Type Gj104 Guhring Micro-Precision System 104 Carbide Stick Insert With 4Mm Quick Change Shank For Boring & Profiling With Wiper Geometry. Guhring Series No. 25092 Order Code 4.009 Made In Germany, Guhring Part #9250920040090 Guhring Inc.