This metal radiator bleed tool is a must-have for anyone looking to maintain their heating system. The square socket design allows for a secure fit on radiator valves, making the bleeding process and efficient. By using this tool, you can easily release trapped air, ensuring your radiators operate at and provide consistent heat. Features -Color:White -Material:ABS -Size:2.10X1.80X0.90cm/0.83X0.71X0.35in -Simple operation: bleed valve key and wrench make controlling radiator bleeding and draining effortless - release: the square socket key design ensures the bleed valve opens fully for complete air release -Compact and portable: the key's compact design makes it easy to carry and store -Wide application: suitable for radiators and other bleed valves, providing broad usability -Easy installation: just insert the key into the valve port for easy and quick installation Package list: 4 x Radiator Valve Keys