The Powerbuilt 3-piece 1/2-inch drive locking socket extension bar set is designed for durability and ease of use. The locking function ensures sockets stay connected. Perfect for tackling a variety of tasks. This set includes three essential extension bar lengths: 6-inch, 9-inch, and 12-inch giving you the right tool for almost any job. Whether working in tight spaces or needing extra reach, these extensions provide the flexibility and convenience you need.