Introducing the Premium Insulated 1/2 Inch Drive Deep Socket 21mm, your ultimate tool for safety and performance in any environment. This top-tier ITL socket is expertly designed to exceed international safety standards, ensuring your protection while you work. With a lifetime guarantee on both the tool and its insulation, you can count on its exceptional durability and reliability. Crafted from high-quality injection molded nylon thermoplastic, this socket has passed rigorous testing to IEC60900, Category C and ASTM F1505 standards, making it resistant to extreme impacts and abrasion. It also boasts flame retardant properties for added safety. Each ITL tool undergoes a stringent safety test, being submerged in water with 1000 volts for three minutes, guaranteeing maximum protection. Whether you are working in temperatures ranging from -40ºF to 158ºF (-40ºC to 70ºC), this 21mm deep socket is the ideal companion for all your heavy-duty tasks. Elevate your toolkit with this reliable and safe insulated socket.