Universal radiator bleed keys, square keys, for central heating and accessories, for many radiators

【Package Contents】 3 x radiator keys, made of metal, improve radiator performance and reduce noise. 【Quality Material】Stainless steel radiator key, sturdy, not easily damaged, for long-term use. 【Easy to Use】Place the radiator bleed key on the valve and turn it counterclockwise to bleed the unit. 【Application】A universal key for most radiators; radiator ventilation can improve efficiency. 【Noise Free】Use the square key to say goodbye to radiator noise interference and improve heating performance.