6mm Min Bore, 52mm Max Reach, GUHRING Boring & Profiling LH System 106 Insert, 0.10mm Radius, Nano-A Coated Left Hand,0.10mm Radius,TiAlN Coated GT106.2357.010.52.60.L, Nano-A Coated Type GT106 Guhring Micro-Precision System 106 Carbide Stick Insert with 6mm Quick Change Shank For Boring & Profiling, 0.30mm (t-max) Offset. Guhring Series No. 25703 Order Code 6.036 Made in Germany, Guhring Part #9257030060360