*KeyFeatures *Cost-Effective Kit: The 1/8-inch shank CNC router bits set includes a combination of four types of cutting heads: 10 x spiral flat nose end mills, 10 x spiral ball nose end mills, 10 x nano blue coating end mills, and 10 x titanium coating end mills. *Durable & Stable: Each CNC milling bit is forged from tungsten steel alloy, ensuring sharp edges and a smooth, burr-free surface. They exhibit high wear resistance and durability, providing you with stable milling performance. *Efficient Chip Removal: The 2-flute spiral drill bits are specifically designed for carving and sculpting curved surfaces. Precision-ground spiral flutes facilitate quick chip removal and avoid tool sticking, enhancing your work efficiency. *Wear-Resistant Coatings: The CNC router bit end mill features a high hardness and heat-resistant nano blue coating and titanium coating to extend service life and deliver optimal cutting results. Ideal for processing materials such as carbon steel, soft alloy steel, tool steel, cast iron, and aluminum alloys. *High Compatibility: The CNC mill kit is compatible with most engraving machines, precision carving machines, CNC machines, and any machine equipped with a 1/8-inch collet. ******************************************************************************************************* *Specifications Item Model Number: 40PCSCNC Material: Tungsten Steel Type: 2-Flute Flat Nose Sprial Bit & 2-Flute Ball Nose Sprial Bit Weight: 0.4 lbs / 0.19 kg Shank Diameter: 1/8 in / 3.175 mm Cutting Edge Diameter: 0.03-0.1 in / 0.8-3 mm Cutting Edge Length: 0.2-0.7 in / 5.5-17 mm Overall Length (OAL): 1.5 in / 38 mm ******************************************************************************************************* *Pakcage Content 40 x End Mills 4 x Storage Boxes