The metal radiator bleed key is designed for efficient air release from your heating system. Featuring a square socket, it fits securely into radiator valves, making the bleeding process simple and effective. This tool helps maintain the efficiency of your heating system by preventing airlocks and ensuring even heat distribution, providing you with consistent warmth. Features -Color:White -Material:ABS -Size:2.10X1.80X0.90cm/0.83X0.71X0.35in -Effortless operation: bleed valve key and wrench make it easy to control radiator bleeding and draining -Effective bleeding: the square socket key design ensures the bleed valve opens fully for complete air release -Compact and lightweight: the key's design makes it easy to carry and store - use: ideal for radiators and other bleed valves, providing wide usability -Simple installation: just insert the key into the valve port for a setup Package list: 4 x Radiator Valve Keys