This worm gear is a high-quality product made in the United States. It is constructed from durable carbon steel and has the part number B01638-03-01. This gear is compatible with various safety accessories and security features, making it an essential component for your needs. Whether you're looking to enhance the safety of your vehicle or improve security measures in your workplace, this worm gear is a reliable choice. With its sturdy construction and precise design, you can trust it to perform effectively and efficiently.