Micro 100 RRM-300-20X Right Hand Retaining Ring Grooving Tool, Solid Carbide, AlTiN Coated, Metric Dimensions, 3.00 mm Groove Width, 3.75 mm Projection, 12 mm Minimum Bore Diameter, 20 mm Maximum Bore Depth, 12 mm Shank Diameter, 83 mm Overall Length