SPECIFICATIONS: This ARES 9/16-inch Magnetic Spark Plug Socket is 3/8-inch drive and is constructed of durable, heat treated Chrome Vanadium Steel. This socket also features a mirror polish finish for easy cleanup and a professional look with high visibility markings for easy identification. | DESIGN: The socket's interior magnet retains and protects the spark plug for easier installation and removal, so you can count on it to hold onto spark plugs when it counts. | MADE TO LAST: The interior magnet in this socket won't wear out over time like traditional rubber gaskets, so this spark plug socket can provide years of reliable use. This spark plug socket meets and exceeds ANSI/ASME standards. | RELIABLE | EFFECTIVE | EFFICIENT: Users trust ARES to be quality tools. You are backed by our Performance Assurance Limited Lifetime Warranty. If you have any issues with your ARES Magnetic Spark Plug Socket, simply contact customer service for troubleshooting help, parts, replacement, or refund. | ASPCA BUSINESS AMBASSADOR: We are proud to be part of the ASPCA Business Ambassador Program. If you have a pet, you realize they are more than a pet, they are part of the family. With your support, we’re proud to help this great organization.