Stanley fatmax hexagon key locking sets stanley 0 97 552 stanley fatmax metric locking hex key set with unique 3 position locking system for all types of job applicationslockable keys that lock in 90 135 and 180 for easy access and to prevent unwanted movementbutton release for quick and easy lockingunlockingthe stanley fatmax 0 97 552 is a metric set with the following sizes15 2 25 3 4 5 6 7 amp 8mm stanley 0 97 552 fatmax hexagon key locking set of 9 15 8mm