Features 1、Suitable for 3D relief and complex 3D carving. Widely used for engraving, drilling, milling, cutting of hardwood, plywood, acrylic, plastic fiber, resin, printed circuit board and other materials 2、Ideal for 3D carving. Easy to remove chips. 2‑blade spherical nose spiral drill bit, the spherical nose is used for carving curved surfaces 3、Nano blue coating can enhance the hardness, prolong the service life, and the drill bit is more durable and wear‑resistant 4、The cutting edge is of sharpness and the surface has no burrs. Ultra‑fine hard tungsten steel material can ensure engraving and milling performance 5、Tungsten steel come with high hardness, wear resistance, strength and toughness Specification Item Type: Ballnose Cutter Material: Tungsten steel Color: Blue coated Total Length: Approx. 45mm / 1.8in Handle Diameter: Approx. 3.175mm / 0.1in Blade Length: Approx. 22mm / 0.9in Drill Diameter: Approx. 3.175mm / 0.1in Package List 1 x Ballnose Cutter