Micro 100 Boring Bar, manufacturer part number QMBB-100500X.
Specifications: Minimum Bore Diameter: 0.1000 in; Maximum Bore Depth: 1/2 in (0.5000 in); Shank Diameter: 3/16 in (0.1875 in); Overall Length: 1-1/2 in (1.5000 in); Hand Direction: Right; Neck Diameter: 0.0750 in (1.90 mm); Centerline Offset: 0.0500 in; Projection: 0.0125 in; Tooth Width: 0.0700 in; Head Width: 0.0875 in; Length from Holder: 0.5900 in.
Coating/Finish: AlTiN. Unit of measure: Inch.