ARES 70011 | 5 pc. High Visibility 3/8-inch Drive SAE & Metric Spark Plug Socket Set | Heat Treated CR-V Steel Mirror Polish Sockets with Rubber Retaining Rings Spark Plug Removal SPECIFICATIONS: Your spark plug socket set includes 5/8-inch, 3/4-inch,13/16-inch, 14mm, and 18mm sockets sizes and a reusable storage rail. High visibility markings ensure you will be able to identify these specialized sockets in your tool box. The precision rubber retaining ring ensures plug stays on the socket during the removal and installation process, and the tapered 6-point socket ends grip the flat sides of fastener head, not corners, to prevent round-off. QUALITY MATERIALS: Although there are cheaper spark plug sockets available, they're usually shorter with a rubber insert that's hardened (if there's an insert at all) and made of inexpensive carbon steel that cracks. Your set from ARES is made from Heat Treated Chrome Vanadium Steel, with precise rubber retaining rings. Additionally, the High Visibility markings ensure you can find them when duty calls. These sockets meet and exceed ANSI/ASME standards. GET THE SET: Unless you have a specialized plug (found in some German cars and Ford Trucks), this set will cover most applications. 5/8-inch is the most popular spark plug size for vehicles, but wont cover your small power tools such as chainsaws, trimmers, leaf blowers, and more. With this set, you wont have to hunt around Amazon for the right size, because youll already have it. 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 Spark Plug Socket Set, 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, were proud to help this great organization. Includes: 5 pc. spark plug sockets Sizes: 5/8-inch, 3/4-inch, 13/16-inch, 14mm, and 18mm 3/8-inch drive Reusable storage rail Constructed of Heat Treated, Chrome Vanadium Steel Precision rubber retaining ring ensures plug stays on socket High visibility markings Tapered 6 point socket ends grip flat sides of fastener head, not corners, preventing round-off These sockets meet &amp; exceed ANSI/ASME standards