HIGH QUALITY RADIATOR KEYWith the help of the key, annoying noise in the heater can be avoided and the power can be increased. High-quality craftsmanship makes it easy to use, so that ventilation can be carried out easily without much effort. EASY TO USEThe universal radiator bleeder key has a sturdy and easy-to-use shape. grab and is designed to easily and effectively bleed your radiator and restore heat flow throughout your home, you will be more comfortable and have a warmer home. DURABLE AND LONG LASTINGOur radiator bleeder 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 SIZEOur radiator keys come in a pack of 5 to provide you with spare keys in case of loss. The key has a square hole of 5 x 5 mm/0.2 x 0.2 inches and the overall dimensions are 25 x 23 mm. Please check the dimensions of the radiator lock before ordering. WIDE APPLICATIONSFlintronic radiator valve keys fit most radiator heating systems, saving you time. This key universal radiator is compatible with both older and more modern radiators.