Condition: 100% Brand New Item Type: Spiral Router Bit Material: Tungsten steel Color: Blue plating Total Length: Approx. 38mm / 1.5in Shank diameter: Approx. 3.175mm / 0.13in Blade Length: Approx. 12mm / 0.47in Drill Diameter: Approx. 2.5mm / 0.1in Quantity: 10pcs Package List 10 x Spiral Router Bit 1Used for rilling, milling, cutting and carving of hardwood, plywood, acrylic, plastic fiber, resin, PCB and other materials. 2Ball nose router bit for carving and sculpting surfaces, easy to remove cuttings. 3The nano blue coating increases hardness, resulting in longer service life, and the drill bit is more durable and wear resistant. 4Great for 3D embossment and complex 3D sculpture. Made of high quality tungsten steel material. 5The cutting edge with high sharpness and the surface is free from burrs, ensures engraving and milling performance.