HIGH QUALITY RADIATOR KEY With the help of the key, you can prevent annoying noises in the heater and improve heating efficiency. High-quality craftsmanship ensures easy operation, allowing for simple and effective radiator bleeding with minimal effort. EASY TO USE: The radiator bleed wrench features a sturdy, ergonomic design for a secure grip. It is designed to easily and effectively bleed radiators, helping restore consistent heat flow throughout your home for improved comfort. LONG LASTING AND DURABLE: Made from high-quality zinc alloy, the radiator wrench is built to last and withstand demanding use. The top includes a hole for attaching to a key ring, making it convenient to carry, store, and keep from getting lost. PRODUCT DIMENSIONS: The key has a square hole of 5 x 5 mm (0.2 x 0.2 inch), with an overall size of 25 x 23 mm. Please verify your radiator valve size before purchasing. WIDE APPLICATION: This radiator valve key fits most radiator heating systems and is compatible with both older and radiators, offering a universal solution for efficient maintenance.