Atoplee 20pcs 3.175mm 10&deg; 15&deg; 20&deg; 30&deg; Carbide PCB Engraving CNC Bit Router Tools(5pcs of each sizes) Package Included: 20pcs flat bottom engraving bits5pcs of each sizes) Degree: 10 15 20 30 ,Shank diameter: 3.175mm, Cutting edge diameter: 0.1mm , Total length: 27-33mm High-precision tool grinding. A power tool for 2D sculpture, 3D sculpture. Large capacity Chip elimination, high efficiency and good quality. A Wide Range of Materials can be engraved, including:Copper,  Aluminum,ABS, Acrylic, PVC, Nylon, Resin ,Majority of plastics  ,Wood,Fibre glass ,Carbon. Type: Flat bottom engraving bits S hape: V-shape Degree: 10 15 20 30 Shank diameter: 3.175mm Cutting edge diameter: 0.1mm Total length: 27-33mm Package Included: 20pcs flat bottom engraving bits for CNC router tool