2.0Mm Min Bore Guhring Back-Bore/Profile Rh System 104 Insert, 0.30Mm (T-Max) Offset, 7Mm Reach, Nano-A Coated Right Hand, 0.10Mm Radius, Tialn Coated Gt104.3217.010.07.20.R, Nano-A Coated Type Gt104 Guhring Micro-Precision System 104 Carbide Stick Insert With 4Mm Quick Change Shank For Back Boring & Profiling. Guhring Series No. 25108 Order Code 4.002 Made In Germany, Guhring Part #9251080040020 Guhring Inc.