The SC-EM4CRA(20) 5/16X5/16 .045 from Field Tool Supply is a robust end mill designed for precision machining. With a diameter of 5/16" and a cutting length of 5/16", this tool is perfect for milling operations in various materials, including aluminum and steel. The .045" cutting edge provides excellent performance in tight spaces and intricate designs. Crafted from high-speed steel, it offers durability and resistance to wear, ensuring a longer tool life. This end mill is compatible with a range of milling machines, making it an essential addition to any workshop.