kiwi,
You don't even need a hammer.
You just heat the conduit and force the form in the end of the conduit give it a few twists and you're done!.
NZ Insulators market them, but if you ask at your local Ideal store they could more than likely get you one, or give NZI a ring.
Saves gluing conduit sockets all over the place. [Linked Image]

Alan, what have you been smoking that you shouldn't have been?. [Linked Image]