Micro 100 Boring Bar, manufacturer part number MBB-025050.
Specifications: Minimum Bore Diameter: 0.0250 in; Maximum Bore Depth: 0.0500 in; Shank Diameter: 1/8 in (0.1250 in); Overall Length: 1-1/2 in (1.5000 in); Hand Direction: Right; Neck Diameter: 0.0200 in (0.50 mm); Centerline Offset: 0.0125 in; Projection: 0.0025 in; Tooth Width: 0.0250 in; Head Width: 0.0225 in.
Coating/Finish: Uncoated. Unit of measure: Inch.