The Facom 4mm Long Ball End Hexagon Allen Key represents one of the most commonly used sizes across automotive, machinery, and general engineering applications. This versatile dimension is encountered in countless fastening situations, from vehicle components and power tools to industrial equipment and general fabrication work, making it an essential tool for professional tradespeople. Constructed from high-quality silicon steel, this 4mm key delivers the strength and durability required for daily workshop demands without premature wear or deformation. The spherical ball end design offers significant practical advantages, enabling you to engage fasteners at angles up to 30° where straight-line access is prevented by surrounding components or structures. The long shaft provides enhanced reach into deeper recesses whilst delivering improved leverage for loosening resistant fixings. Finished with a protective phosphate coating, this key withstands the rigours of professional use, resisting corrosion from oils, coolants, and atmospheric moisture whilst maintaining a secure grip during operation. Features and Benefits: • Silicon steel construction for professional-grade durability • Spherical ball end allows up to 30° angled approach • Phosphate finish provides corrosion resistance • Long design offers superior reach and leverage Specifications: Size: 4mm