The WALTER 6618071 Solid Carbide Twist Drill is engineered for precision drilling in various materials, including steel, stainless steel, and non-ferrous metals. With a 4mm cutting diameter and a 66mm overall length, this drill bit is designed to deliver consistent performance in demanding applications. The TiNAl coating enhances durability and reduces friction, extending tool life and maintaining sharpness during extended use. The H6 shank ensures a secure fit in compatible chucks, minimizing runout and improving drilling accuracy. Designed for high-speed operations, the drill bit can withstand rotational speeds up to 100,000 RPM, making it suitable for both manual and automated drilling processes. The 140, point angle facilitates efficient chip removal and precise hole formation, while the right-hand helix with a 30, angle provides optimal cutting efficiency and chip evacuation. The 2-flute design balances strength and cutting performance, reducing vibration and enhancing hole quality. With a weight of 0.021 kg, the drill bit offers a lightweight yet robust solution for various drilling tasks. The absence of coolant entry and exit ports indicates that this drill bit is intended for dry drilling applications, suitable for environments where coolant use is impractical or undesirable. The 17mm neck length and 36mm shank length provide adequate reach and stability, accommodating a range of drilling depths and setups. The 24mm flute length allows for efficient chip removal, reducing the risk of clogging and maintaining consistent drilling performance. The 0.728mm point length and 65.27mm functional length contribute to the drill bit's overall rigidity and precision. The 29.998mm protruding length and 17mm usable length offer versatility in various drilling scenarios, ensuring the drill bit can perform effectively in different setups. The 24-month warranty reflects WALTER's commitment to quality and customer satisfaction, providing assurance of the product's reliability and performance over time.