This metric long arm hex key is manufactured from fully hardened carbon steel for strength, durability, and long service life. Both the handle and tip are made from high-quality chrome vanadium steel, ensuring excellent wear resistance and precise fit in fasteners. The ergonomically designed handle provides a secure, high-grip surface that allows you to apply strong torque while maintaining user comfort, even during extended use. With a 190 mm long arm, this hex key offers improved reach and leverage in tight or recessed areas, making it ideal for assembly, maintenance, and repair tasks. The 5 mm hex tip delivers accurate engagement with compatible screws and bolts, helping reduce rounding and slippage. Perfect for professional mechanics, engineers, and DIY users who demand reliable hand tools for everyday applications around the home, workshop, or job site.