1/8" x 60 Degree, Scoring / Engraving, Trace Isolation V-Bit Engraver High Precision - Made in U.S.A. E107. $14.99 USD. View all. Find an extensive selection of Carbide Drill Bits, incremental size Sets, Route and End Mill Bits and engravers at Drill Bits Unlimited. Ideal for wood, aluminum, carbon fiber, PCB, and plastic applications.