Necessary when a person does not have a vehicle that can transport long tent frame rafters.
Used to connect tent frame poles after rafters are cut in half.
Example, 8 ' rafter can be cut in half and the sleeve connects the two 4' poles.
Hardware store conduit sleeves are not strong enough to connect rafters and carry any type of load. Conduit sleeves available at hardware stores are lightweight and approximately 3" long.