From two parallel waves or eight chain thru formation: All arm turn half, centers Single Hinge, then the centers in the wave across the set Trade to Single Hinge with the wave end. Finishes in parallel waves.
Note: This movement was invented first but was almost immediately overshadowed at workshops by Spin Chain Thru. At the time, the 1/4 turns seemed to happen too quickly. Today, dancers are much more comfortable with 1/4 turns (Single Hinges) than they were then.
Deuce Williams 1967
This definition is from The Handbook of Modern Square Dancing by Jay King.
It is provided here for informational and educational purposes only.