U-Swivel Nunchaku are type of chained nunchaku created by Douglas Dolan in 1976. U-Swivels differ from the more common ball bearing swivel nunchaku because of the head joint. U-Swivel nunchaku were very popular for years, but today are becoming very rare. While there are other companies that make U-Swivel nunchaku Dolans' is no longer in business.
The top of each stick consists of a pivot bolt with a head that holds the center portion of a u shaped swivel. A pin extends through the side arms of the U shaped swivel and through the lower loop of a clevis or shackle. The shackle connects to the chain, and the chain connects the two sticks. The U shaped swivels rotate and the clevis/shackle's move from side to side also.