Compatibility with H4 Hexagonal Bits: Specifically designed for 4mm Hexagonal bit, ensuring precisely fit and stable torques transmission to stripping and improve fastening results Premium Aluminum Construction: Crafted from high strength aluminum alloy, this screwdriver handle lightweight durability with rust and oxidation resistance for reliability in various working environment Ergonomic Handle for Comfort: The humanized handle design provides a comfortable grip, reducing hand fatigue during prolonged use while offering better control and flexibility Design for Convenience: Features interfaces that securely holds H4 Hexagonal bit, loss and allowing quick bit changes to enhances efficiency during different tasks Versatile Tool for Multiple Uses: Ideal for home repairs, projects, model assembly, and more, making it an essential addition to any toolbox for everyday convenience, Manufacturer: Kfwfuaee