Bleeding Old Home Radiator: These radiator keys for bleeding radiators are the perfect tool for releasing air and water from your radiators, baseboard radator and central heating system. Radiator Key: With this small bleed key, you'll be able to keep your radiators running at their best, ensuring that your home stays warm and comfortable all year round. Ergonomic Handle: This Radiator Bleed Key features a durable, rust-resistant nickel plated brass construction and an ergonomic handle for easy, comfortable use. Dimensions: 1/8" | Material: Nickel Plated Brass | Quantity: Pack of 5