ITEM SPECIFICATIONS: These light, portable metal socket organizers are 17 inches long, made of machined aluminum and come in 1/4-inch, 3/8-inch, and 1/2-inch drive. Each rail holds 16 metric or SAE sockets, and the socket clips have spring-loaded ball bearings to firmly hold sockets in place, even upside down. **Sockets are not included** | VERSATILITY: Every ARES socket rail is fully customizable, with removable end caps to allow for easier clip changes, in addition to being wall-mount ready. Whether you plan on using an ARES socket organizer to assemble a socket set that will travel with you effortlessly or just want a way to keep your garage more organized, these socket organizers have you covered. | INTERCHANGEABLE: Our patented ball bearing socket clips glide over any of the aluminum rails, allowing you to mix and match your sets as you please. If you want to put a few 1/4-inch sockets on your 1/2-inch socket organizer, you can. | 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 Socket Organizer, 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.