Package contents: 3 pieces metal heating keys, improves heating performance and reduces noise pollution.
Quality material: stainless steel radiator key, durable, not easy to damage, long-term use.
Easy to use: Place the radiator bleed key on the valve and turn it counterclockwise to vent the device.
Use: universal key for most radiators, bleeding radiators improves efficiency.
Noise free: use the square key to say goodbye to the interference caused by radiator noise and improve heating performance.