The Monument 2056D Three Legged Radiator Valve Key is a versatile brass tool designed for opening and closing radiator valves across multiple sizes. This essential plumbing accessory features three different square profiles to accommodate 1/2in, 3/4in and 1in radiator valves, making it a practical solution for both heating engineers and property maintenance professionals. Manufactured from brass pressing, this radiator valve key provides the durability required for regular use whilst maintaining compatibility with standard square spindle valves. The three-legged design incorporates 7mm, 8mm and 9mm square profiles, ensuring the correct fit for a wide range of radiator valve configurations found in UK heating systems. Ideal for heating system maintenance tasks, balancing radiators, or isolating individual radiators for repairs, this multi-profile key eliminates the need to carry multiple tools. The compact design makes it convenient to keep in a toolbox or service bag for emergency call