Discover the Premium Insulated 4mm T Handle Hex Key, expertly engineered for safe and efficient use on connector boxes. Made with high-quality injection moulded nylon 11, this hex key surpasses IEC 60900 standards, ensuring you have a reliable tool for live line working. Designed to endure extreme temperatures from -40°C to 70°C, it is the only tool in its category that meets stringent Category 'C' requirements. Renowned for its outstanding toughness, this nearly indestructible tool is backed by a lifetime warranty on both the tool and its insulation, making it the go-to choice for professionals. Upgrade your toolkit today with this essential insulated hex key and enjoy unmatched safety and durability for all your electrical tasks. The ITL Insulated Light T Handle Hex Keys are for use on connector boxes. Made from injection moulded nylon 11, which exceeds the requirements of IEC 60900, the industry standard for live line working. In addition, this tool meets the requirements of Category 'C', which requires it to perform at extreme temperatures of -40C to +70C, making it unique in this category. These insulated tools are the toughest in the market, being virtually indestructible. With a lifetime warranty on both the tool and insulation. 1 x ITL Insulated Light T Handle Hex Key 4mm. PTDITL02631