0.245 0.025 6.4 mm Shank Di 12.7 mm AlTiN Coated Groove Width 0.64 mm 0.500 0.050 Maximum Bore Depth Projection Minimum Bore Diameter 0.2500 1.27 mm Micro 100 QFR-025-8X Quick Change Full Radius Grooving Tool 6.2 mm Solid Carbide Tool