The radiator bleed key is an essential tool for maintaining your heating system. By using this key, you can easily release trapped air from your radiator, ensuring optimal heating efficiency. This tool is particularly useful during the colder months when your heating in constant use. Features -Color:Black -Material:Zinc alloy -Size:2.50X2.40X0.90cm/0.98X0.94X0.35in -Sturdy material: made from zinc alloy materials, these radiator bleed keys are designed to resist rust and ensure durability -Easy operation: equipped with a bleed valve key, these tools allow users to easily release trapped air from radiators, enhancing overall efficiency -Suitable size: specifically designed for radiators, these keys are compatible with a wide range of radiators available in the market -Bulk packaging: providing ample quantity to meet various user needs and ensuring you always have a spare on hand -Enhanced heat dissipation: installing these keys can significantly improve the release process, thereby boosting the radiator's heat dissipation efficiency Package list: 10 x radiator keys