Hole Enlarging Drill Bits10pcs 3.175mm Shank 3 Edge Engraving Bit Set Tip 0.1mm 20/30/45/60/90 Degrees Carbide PCB Machine Router Bit 3D CNC Milling BitsFeatures:1. Suitable for CNC engraving machine2. Suitable for cutting the acrylic, PVC, hardwood and medium-density fiberboard3. Widely used in handicrafts, electronics, advertising, decoration, wood processing industrySpecification:Material: CarbideEdge: 3Shank: 3.175mmTip: 0.1mmDegrees: 20 30 45 60 90Application:Majority of plastics ,Copper, aluminum, iron, jade and other hard materials engraving and cutting fine, Acrylic, PVC, Nylon, Resin, Wood, Plywood, Hardwood, Fibre glass, marble, etc