These outrigger accessory clamps attach to the third pole section on 22' and 27' outriggers, as well as the base pole section on all 17' or 18' outriggers, accessory poles, shade poles, and flag poles. They can also attach to other tubes or pipework approximately 1.2" in diameter. They can support teaser pulleys, flags, shades, or other accessories. For pulling dredges, they should only be used with 22' and larger outriggers.