What it is: 

the Single Flute Engraving Bit typically features a single cutting edge that extends from the tip of the bit. This singular flute creates a clean, well-defined edge in the material being engraved, ideal for intricate detailing.

Specifications:
Shank Diameter: 3.175mm
Total Length: ~ 38mm
Material: Solid Carbide

Applications:
Curve surface milling, Relief milling, Small text engraving, etc.

Materials:
Wood, Plastics, Composite materials, etc.