Micro 100 Boring Bar, manufacturer part number BB-3601150SX.
Specifications: Minimum Bore Diameter: 0.3800 in; Maximum Bore Depth: 1.1500 in; Shank Diameter: 3/8 in (0.3750 in); Overall Length: 2-1/2 in (2.5000 in); Hand Direction: Right; Neck Diameter: 0.2700 in; Centerline Offset: 0.1725 in; Face Dimension: 3/16 in (0.1880 in); Projection: 0.0900 in; Tooth Width: 0.2000 in; Split Length: 0.2450 in.
Coating/Finish: AlTiN. Unit of measure: Inch.