Keep your heating system running smoothly with this radiator vent key. It is specifically designed to open radiator bleed valves, allowing trapped air to escape and improving heat distribution. The key's robust construction keeps durability, while its user-friendly design makes it simple to operate. Ideal for both professional plumbers and DIY enthusiasts. Features -Color:Silver -Material:Copper -Size:3.80X3.50X0.90cm/1.49X1.38X0.35in -Note: 5mmX5mm square calibers -Sturdy: constructed with copper materials, this radiator bleed key ensures strength and durability for extended use. -Effortless operation: the bleed key makes radiator maintenance and simple for users -Effortless operation: the included bleed valve key allows for easy air release from radiators, making maintenance and efficient -Multipurpose: suitable for different types of taps and radiators, it can also serve as a wrench for various valve types -Optimized heat dissipation: by effectively releasing trapped air, these keys help improve the radiator's heat dissipation, enhancing overall efficiency Package list: 1 x radiator accessories