Specification: Material: Carbide Edge: 3 Shank: 3.175mm Tip: 0.1mm Degrees: 20 30 45 60 90 Application: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 Note: Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package Including: 10pcs Pyramid Engraving Bit