Micro 100 Boring Bar, manufacturer part number HBBC-040187-004.
Specifications: Minimum Bore Diameter: 0.0400 in; Maximum Bore Depth: 3/16 in (0.1870 in); Shank Diameter: 1/8 in (0.1250 in); Overall Length: 1-1/2 in (1.5000 in); Hand Direction: Right; Neck Diameter: 0.0350 in (0.90 mm); Centerline Offset: 0.0200 in; Face Dimension: 1/16 in (0.0630 in); Head Width: 0.0375 in; Corner Radius: 0.0040 in.
Coating/Finish: Uncoated. Unit of measure: Inch.