Micro 100 Boring Bar, manufacturer part number PBT4-140500.
Specifications: Minimum Bore Diameter: 0.1520 in; Maximum Bore Depth: 1/2 in (0.5000 in); Shank Diameter: 3/16 in (0.1875 in); Overall Length: 2.0000 in; Hand Direction: Right; Neck Diameter: 0.1150 in; Centerline Offset: 0.0463 in; Projection: 0.0250 in; Corner Radius: 0.0040 in.
Coating/Finish: Uncoated. Unit of measure: Inch.