Micro 100 Boring Bar, manufacturer part number BB-4902750X.
Specifications: Minimum Bore Diameter: 0.5100 in; Maximum Bore Depth: 2-3/4 in (2.7500 in); Shank Diameter: 1/2 in (0.5000 in); Overall Length: 4.0000 in; Hand Direction: Right; Neck Diameter: 0.3680 in; Face Dimension: 1/4 in (0.2500 in); Split Length: 0.3200 in; Centerline Offset: 0.2400 in; Projection: 0.1220 in; Tooth Width: 0.3000 in; Corner Radius: 0.0060 in.
Coating/Finish: AlTiN. Unit of measure: Inch.