Craftsman Hammerhead 12 volt auto hammer.
My dearest wife bought me one of these today, for Christmas. Actually, I went out and bought it, paid for it and if I wanted it gift rapped, I'd probably would have to do that too. But isn't it the thought that counts??? LOL
Anyway, got to "play" with it a bit, before putting it away until Christmas. It does work "pretty" good. I think they need to improve how it holds the nails. They claim that you only need one hand to start and hammer in the nail. And well, you might can, but it's a bit tricky to get the nail to go in straight. The nail is held up against the hammerhead, by means of magnetized, spring loaded sleeve. Only problem is the I.D. of the sleeve is about 1/4" or a little bigger. So small headed nails, or finish nails don't sit still or flat on the hammer head. I think if the head of the piston (the hammerhead) was magnetized, instead of the sleave, It might work better. It pulls the nail to the side of the sleve, and if the nail has any head at all, it sits cocked in the sleeve. Other then that, it works great. I read some reviews that it won't hammer a 3 1/2" nail all the way down. Worked fine for me.
I can see it will be helpful in tight area's. It will just take a little practice, or hold on to the nail till it starts in the wood straight. And the only other negative, is it only comes with one battery. I bought a spare for 21 bucks. The Hammerhead was on sale (Black Saturday) for 69.