The four-piece Paramount 1/4" drive locking socket extension set includes 3-inch, 4-inch, 6-inch, and 10-inch socket extensions. The locking extension bar combines elegant design with sturdy construction to create a safer more effective socket accessory. Each lock mechanism has a protective ring around the release button so the extension bar can be used with high speed equipment with lower risk to the user's fingers or hands. Push button provides fast and efficient lock release. Positive locking effect is solid and rattle-free.