Micro 100 Boring Bar, manufacturer part number QBB-4901250X.
Specifications: Minimum Bore Diameter: 0.5100 in; Maximum Bore Depth: 1-1/4 in (1.2500 in); Shank Diameter: 1/2 in (0.5000 in); Overall Length: 3.0000 in; Hand Direction: Right; Neck Diameter: 0.3670 in; Centerline Offset: 0.2400 in; Projection: 0.1230 in; Tooth Width: 0.3000 in; Length from Holder: 1.5400 in; Corner Radius: 0.0050 in.
Coating/Finish: AlTiN. Unit of measure: Inch.