Thanks for the response, guys. I will use the ones I have now that I know I am not going to damage anything. Not done yet since I needed an extension to the ratchet. The one I had wasn't long enough and the one my dad lent me was long enough but was the wrong drive (half inch I think). I will get a new socket to fit the longer bar when I get the chance.

Rotten weather today, though, didn't fancy it much in any case!