<b> Specification: <br></b> Material: Carbide <br> Edge: 3<br> Shank: 3.175mm<br> Tip: 0.1mm <br> Degrees: 20 30 45 60 90 <br> Application: Majority of Plastics , PCB, Copper, Aluminum, Acrylic, PVC, Nylon, <br>Resin, Wood, Plywood, Hardwood, Glass fiber, Marble, etc. <br><br> <i><b> NOTE: <br></b> When engraving harder materials, it is necessary to increase the speed and reduce the feed rate to avoid tool breakage </i><br><br> <b>WHAT'S INCLUDED? <br></b> 2pcs 20° x 0.1mm 3 Edge Pyramid Engraving Bits <br> 2pcs 30° x 0.1mm 3 Edge Pyramid Engraving Bits <br> 2pcs 45° x 0.1mm 3 Edge Pyramid Engraving Bits <br> 2pcs 60° x 0.1mm 3 Edge Pyramid Engraving Bits <br> 2pcs 90° x 0.1mm 3 Edge Pyramid Engraving Bits <br>