HIGH QUALITY RADIATOR KEYWith the help of the key you can prevent annoying noises in the heater and increase the power. High-quality craftsmanship makes it easy to use, so venting can be done easily without much effort.EASY TO USE: The radiator bleed wrench has a sturdy, easy-to-grip shape and is designed to easily and effectively bleed your radiator and restore heat flow throughout your home, you will feel more comfortable and have a warmer house.LONG LASTING AND DURABLE: Our radiator wrench set is made of high quality zinc alloy, so they will last a long time and can handle even the toughest jobs. The holes on the top are easy to hang on the key ring, easy to carry and store, and not easy to lose.PRODUCT DIMENSION: The key has a square hole of 5 x 5 mm/0.2 x 0.2 inch, and the overall size is 25 x 23 mm. Please check your radiator lock size before ordering.WIDE APPLICATIONS: Radiator valve wrenches fit most radiator heating systems, saving you time. This universal radiator key is compatible with older and more modern radiators.