The Domination Bands are a male version of the a'dam, a ter'angreal for controlling men who can channel. They take the form of a finely jointed collar and two bracelets of dull black metal. The Domination Bands are made of a form of cuendillar and are nearly impossible to destroy.
The bracelets were recovered in Tanchico, in the Panarch's Palace, by Nynaeve al'Meara and Elayne Trakand after following a lead from a Darkfriend prisoner. They gave them to Egeanin Sarna and Bayle Domon to drop into the ocean.
Egeanin and Domon were stopped by the Seanchan, however, before they were able to dispose of the bracelets. They were turned over to the High Lady Suroth Sabelle Meldarath who, in turn, raised Egeanin to The Blood. They were subsequently copied and six sets were recovered after an abortive attempt to capture Rand. It is unknown whether any other copies remain in Seanchan hands. One set was possessed by Cadsuane Melaidhrin until it was used by Semirhage in an attempt to capture Rand, and was subsequently destroyed. The location of the others is as yet unknown.
Mechanism and limitations
The Domination Bands were made during the Breaking and allow a woman or two women to control a man who can channel. Prior to the cleansing of saidin, the Domination Bands were dangerous to use because they did not prevent the man from going mad. They are also imperfect because, given time, he will eventually be able to control the woman as well as she controlling him. Even removing the bracelets wouldn't be possible without the man, as surely as the man needs a woman to remove the collar. While saidin was tainted, this had extremely dangerous repercussions. Two women in the bracelets reduces this back seepage, but it also makes it harder to control the male channeler.
Cadsuane's set was later destroyed when Elza Penfell stole them from her strong box in association with Shaidar Haran and gave them to Semirhage who used them on Rand. This resulted in Rand's channeling the True Power and destroying the set, and subsequently destroying Semirhage and Elza with the True Power.
This said, it was not a problem for Semirhage to completely control Rand al'Thor's body and connection to saidin, despite a second female channeler wearing the bracelet. It should be noted that Domination Bands impose far more severe limitations on the collared channeler than do the a'dam. The leash holder needs to give express permission for almost any voluntary movement, for example walking or speaking. Breathing and other normal bodily functions seem to be unaffected.