[patrickt]

... a good lead hammer is a pretty handy tool -- you might just end up using it more than you think (and on stuff other than your spinners). I used it not too long ago to break the bolts loose on a stuck caliper -- it's perfect for whacking the end of your wrench when you can't really get the leverage that you need and you can't get something else in there (like an impact wrench). It doesn't bounce off the wrench and it delivers a good "shock."