The H2O Bucktail features the Switch Clevis®, the only clevis that auto counter rotates. It rotates one revolution clockwise and then switches to rotate one revolution counter-clockwise.
Using a small screwdriver, you can easily switch the blades. Run with one blade or two, blades of the same size/type or different sizes/types. The only requirement is that you use at least one high-lift blade on the long arm side of the clevis.