Micro 100 Boring Bar, manufacturer part number BB-2001300G.
Specifications: Minimum Bore Diameter: 0.2160 in; Maximum Bore Depth: 1.3000 in; Shank Diameter: 1/4 in (0.2500 in); Overall Length: 2-1/2 in (2.5000 in); Hand Direction: Right; Neck Diameter: 0.1500 in; Centerline Offset: 0.0750 in; Face Dimension: 1/8 in (0.1250 in); Projection: 0.0500 in; Tooth Width: 0.1500 in; Split Length: 0.1750 in; Corner Radius: 0.0060 in.
Coating/Finish: TiN. Unit of measure: Inch.