I like the Snap-On dead blow hammers. They work better than any other brand out there.
True story. I was at the junkyard like 40 years ago when you all were just twinkles in your daddy's eye, trying to bust loose a stubborn rusted valve cover nut off a mid-90's Honda Civic. At first I used a HF dead blow hammer slogging on an HF ratchet. I know what you're thinkin' -- wrong tool idiot. Anyway, I broke the hammer.
Said **** it.
Called my Snap-On guy and he showed up in 12 minutes on the dot with exactly a Snap-On FHOF80 (best ratchet ever made) and a Snap-On model HBFE32 dead blow hammer (best dead blow hammer ever made). I didn't use the ratchet at first because, well you all know how I like to keep my tools nice and polished, so I decided to just use the hammer alone. Busted that little M10 nut off so fast I couldn't believe it.
I have a Snap-On tattoo now. ;-)
Get yours here at a discount --
http://m.ebay.com/itm/251665845879?nav=SEARCH