The COLLIS #71146 end mill by Field Tool Supply is designed for high-performance machining tasks. This tool features a diameter of 1-1/4 inches, crafted from high-speed steel (HSS) for enhanced durability. Ideal for milling operations, it provides excellent chip removal and surface finish. The end mill is suitable for various materials, including aluminum and steel, making it versatile for different applications. It meets industry standards for quality and is compatible with standard milling machines, ensuring reliable performance in any workshop.