The Stanley FatMax Metric Locking Hex Key Set features a unique 3-position locking system for versatile job applications. Its lockable keys secure in 90°, 135°, and 180° positions for easy access and to prevent unwanted movement. A convenient button release allows for quick and easy locking and unlocking. This set includes 9 metric sizes: 1.5, 2, 2.5, 3, 4, 5, 6, 7, and 8mm. The ergonomic bi-material handle offers a better grip and feel, allowing the user to apply more torque. Extra-long keys provide easy access to recessed bolts, and the "Lock In Place" feature secures the keys, preventing handle movement during use. The set offers flexibility and ultimate access in tight spaces.