4.0Mm Min Bore Guhring Bore/Profie Lh Wiper System 104 Insert, 0.30Mm (T-Max) Offset, 22Mm Reach, Tin Coated Left Hand, 0.20Mm Radius, Tin Coated Gj104.2337.020.22.40.L, Tin 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. 25091 Order Code 4.011 Made In Germany, Guhring Part #9250910040110 Guhring Inc.