Im looking to build up on my tool box from the obvious sockets/ratches/spanners etc to something abit more comprehensive. I do all the repairs to my own cars and to friends when i can but always seem to get stuck when i get to a rounded bolt or internal hex/torx bit!

What tools do you guys recomend/use for beating these?? Looking for any good tools to remove all sorts of rounded bolts/screws/torx/nuts/studs etc