Item Type: Spiral Ball Milling Cutter Material: Tungsten steel Color: Blue Total Length: Approx. 40mm / 1.6in Handle Diameter: Approx. 3.175mm / 0.1in Toughness: Approx. 4mm / 0.2in Drill Diameter: Approx. 2mm / 0.1in Package List 1 x Spiral Ball End Mill 1The spiral ball milling cutter is used for engraving, drilling, milling, cutting and engraving of hardwood, plywood, acrylic, plastic fiber, resin, PCB and other materials. 2This spiral ball nose drill is especially suitable for 3D relief and complex 3D engraving. Cutting edge is acute, the exterior is free of burrs. 3Spiral ball end mill, used for carving and carving curved surfaces, easy to remove chips. 4Nanoblue coating of the drill increases the hardness, thereby prolonging the service life, and the drill bit is more durable and wearresistant. 5This ultrafine hard tungsten steel material can ensure its engraving and milling performance.