6mm Min Bore, 27mm Max Reach, GUHRING 45 Deg Chamfer/Bore LH System 106 Insert, 0.30mm Radius, TiN Coated Left Hand,0.30mm Radius,TiN Coated GT106.4557.030.27.60.L, TiN Coated Type GT106 Guhring Micro-Precision System 106 Carbide Stick Insert with 6mm Quick Change Shank For Boring & Chamfering 45? Both Sides, 1.00mm (t-max) Offset. Guhring Series No. 25741 Order Code 6.007 Made in Germany, Guhring Part #9257410060070