Micro 100 Boring Bar, manufacturer part number QMBB-035075.
Specifications: Minimum Bore Diameter: 0.0350 in; Maximum Bore Depth: 0.0750 in; Shank Diameter: 3/16 in (0.1875 in); Overall Length: 1-1/2 in (1.5000 in); Hand Direction: Right; Neck Diameter: 0.0280 in (0.70 mm); Centerline Offset: 0.0175 in; Projection: 0.0030 in; Tooth Width: 0.0250 in; Head Width: 0.0320 in; Length from Holder: 0.5900 in.
Coating/Finish: Uncoated. Unit of measure: Inch.