Micro 100 Boring Bar, manufacturer part number HBB-1501250.
Specifications: Minimum Bore Diameter: 0.1500 in; Maximum Bore Depth: 1-1/4 in (1.2500 in); Shank Diameter: 3/16 in (0.1875 in); Overall Length: 2.0000 in; Hand Direction: Right; Neck Diameter: 0.1300 in; Centerline Offset: 0.0750 in; Projection: 0.0100 in; Head Width: 0.1400 in; Split Length: 0.3000 in; Face Dimension: 0.0940 in.
Coating/Finish: Uncoated. Unit of measure: Inch.