Micro 100 Boring Bar, manufacturer part number QBT-1801250.
Specifications: Minimum Bore Diameter: 0.1960 in (5.00 mm); Maximum Bore Depth: 1-1/4 in (1.2500 in); Shank Diameter: 1/4 in (0.2500 in); Overall Length: 2-1/2 in (2.5000 in); Hand Direction: Right; Neck Diameter: 0.1500 in; Centerline Offset: 0.0550 in; Projection: 0.0300 in; Tooth Width: 0.0870 in; Split Length: 0.1600 in; Face Dimension: 0.1260 in; Length from Holder: 1.3530 in; Offset: 0.0750 in; Corner Radius: 0.0060 in.
Coating/Finish: Uncoated. Unit of measure: Inch.