Ensure your radiators are with this radiator bleed hole key. It is designed to fit radiator bleed valves, making it a addition to your tool kit. The key's metal construction ensures longevity, while its design allows for easy operation. for homeowners and professionals alike, it helps maintain a warm and comfortable environment. Features -Color:Silver -Material:Copper -Size:3.80X3.50X0.90cm/1.49X1.38X0.35in -Note: 5mmX5mm square calibers -Robust design: built with sturdy materials, this radiator bleed key ensures durability and reliable performance. -Easy maintenance: the bleed key included makes it simple for users to bleed their radiators, enhancing ease of use -Easy operation: with bleed valve key, these tools allow users to easily release trapped air from radiators, enhancing overall efficiency - application: compatible with a variety of taps and radiators, it also functions as a wrench for different valves -Enhanced heat dissipation: installing these keys can significantly improve the release process, thereby boosting the radiator's heat dissipation efficiency Package list: 1 x radiator accessories