The Monument 2052R Universal Radiator and Valve Key is a versatile tool designed for bleeding radiators and adjusting radiator valves across central heating systems. This multi-profile key provides comprehensive compatibility with the most common radiator fittings found in UK properties, making it an essential tool for plumbers, heating engineers and property maintenance professionals. The three distinct profiles ensure universal application, accommodating both 3/8 inch and 10mm square section radiator vent plugs and bleed screws. The tapered ends are self-restricting, preventing over-insertion and potential damage to valve mechanisms during operation. Designed to work with bayonet or internal lug type radiator valves, the key allows for variations in size, shape and positioning commonly encountered across different radiator manufacturers. The 12mm to 14mm internal hexagon valve profiles are tapered to accommodate slight variations in valve dimensions, ensuring a secure fit even when t