This toy wind-up key is perfect for small MARX toys and is a great addition to any vintage or antique toy collection. Made of durable metal, it is built to last and can provide hours of entertainment with its wind-up mechanism. Whether you're a collector or just looking for a fun toy to play with, this wind-up key is sure to impress. It's easy to use and can work with a variety of small MARX toys, making it a versatile addition to your collection. Plus, with free shipping and the cheapest price out there, it's a great deal you won't want to miss.