Sockets are low profile to fit hard to reach areas. Ratcheting head has a freewheel position that allows maximum leverage. Comes with extension for hard-to-reach idler pulleys. Used to remove and install belts on serpentine belt systems. Spring loaded for a great performance Serpentine ratchet is used to release tension on the serpentine belts with a spring loaded idler pulley. It will work where conventional ratchets or breaker bars won't fit due to limited access. Tool includes a 19mm socket for Honda and Toyota applications.