How do I use a 5v/120v relay that is not mounted on a board I bought an arduino kit, and it came with, amongst other things, a 5v relay to control 120-220v.  

The relay is only that, there is only the 5 pin relay, and it's not on a board on which one can screw in the leads 



I was wondering how I can use it..  i.e. how do I mount it somehow (especially since the leads are metric and most perf board is standard (or vice-versa)).

I don't mind soldering the 5v control leads from the arduino, but I'm not so sure about soldering or connecting 110v straight on the relay.  i'm worried about long term longevity.  

I have soldered longer leads just to be able to fit it on a board for tests, but those are tiny, and aren't safe for higher voltage/current.  

Any suggestions?
Thanks, Seb.
What I did with a similar looking 'module' (An AC/DC converter), was to use a protoboard/perfboard. Some holes fitted in the existing holes, others I drilled with a small drill.

On the back you can solder the wires you need, so for the 110V wires you might use thicker wires than for the controls.

Than if you want to make it fancy, you add some terminal blocks to connect the external wires too. Terminal blocks looks like this: