10pcs PCB Drill Bits 0.4mm Tungsten Carbide Rotary Tool Jewelry CNC Engraving - 0.4mm,1Set (10Pcs)($11.49Value)
Specification: Cutting edge diameter (CED): 0.4mm; cutting edge length: 6.5mm; shank diameter: 3mm / 1/8" (approx.) overall length: 38mm / 1-1/2" (approx.)