Item Type: Spiral Ball End Cutter Material: Tungsten steel Color: Blue Total Length: Approx. 55mm / 2.2in Handle Diameter: Approx. 3.175mm / 0.1in Toughness: Approx. 28mm / 1.1in Drill Diameter: Approx. 3.175mm / 0.1in Package List 1 x Spiral Ball End Mill 1This spiral ball end cutter is used for engraving, drilling, milling, cutting and engraving of hardwood, plywood, acrylic, plastic fiber, resin, PCB and other materials. 2The 2 flutes ball end mill is especially suitable for 3D relief and complex 3D engraving. Cutting edge is acute, the exterior is free of burrs. 3Spiral ball drilling cutter, used for carving and carving curved surfaces, easy to remove chips. 4The Nanoblue coating of the drill increases the hardness, thereby prolonging the service life, and the drill bit is more durable and wearresistant. 5This ultrafine carbide material can ensure its engraving and milling performance.