Micro 100 Boring Bar, manufacturer part number QBT-200600X.
Specifications: Minimum Bore Diameter: 0.2160 in; Maximum Bore Depth: 0.6000 in; Shank Diameter: 1/4 in (0.2500 in); Overall Length: 2.0000 in; Hand Direction: Right; Neck Diameter: 0.1700 in; Centerline Offset: 0.0750 in; Projection: 0.0300 in; Tooth Width: 0.0870 in; Split Length: 0.1600 in; Face Dimension: 0.1260 in; Length from Holder: 0.8530 in; Offset: 0.0850 in; Corner Radius: 0.0060 in.
Coating/Finish: AlTiN. Unit of measure: Inch.