Item Type: Spiral Ball End Mill Material: Tungsten steel Color: Blue Total Length: Approx. 50mm / 2in Handle Diameter: Approx. 3.175mm / 0.1in Toughness: Approx. 25mm / 1in Drill Diameter: Approx. 3.175mm / 0.1in Package List 1 x Spiral Ball End Mill 1This ball end mill is widely used for engraving, drilling, milling, cutting and engraving of hardwood, plywood, acrylic, plastic fiber, resin, PCB and other materials. 2The spiral ball end mill is particularly suitable for 3D relief and complex 3D engraving. 3This 2blade spherical nose spiral drill bit, used for carving and carving curved surfaces, easy to remove chips. 4The nano-blue coating of the milling cutter increases the hardness, thereby prolonging the service life, and the drill bit is more durable and wear-resistant. 5Cutting edge is acute, the exterior is free of burrs, and the superfine hard tungsten steel material can ensure its engraving and milling performance.