The radiator utility key is a tool that can be used to bleed air from various types of radiators, including older models. Made from copper material, it offers reliable performance and longevity. Its compact size makes it easy to store and transport, making it an essential tool for anyone looking to keep their heating system in top condition. Features -Color:Golden -Material:Copper -Size:3.70X3.70X0.80cm/1.45X1.45X0.31in -Sturdy copper material: made from robust copper, this key ensures longterm durability and dependable performance for radiator bleeding -Effortless operation: features a bleed key that simplifies the air bleeding process, making it accessible for all users -Multifunctional use: suitable for various rv radiator components, including bleed valves and heat sinks, offers wide ranging utility -Easy installation: the easy installation process ensures that you can set up the tool quickly and without difficulty -Enhanced radiator efficiency: improves the heat dissipation of your rv radiator, ensuring a comfortable and warm living space Package list: 8 x Keys