I ran across this online today, and it just screams “impulse-buy item” — you know, stuffed in a display box right by the checkout counter. It’s also pretty much everything a hammer shouldn’t be. The whole point of a hammer is to apply additional force with a lever. Make the lever shorter and you sorta defeat the purpose. Of course, you can probably stick this one in your pocket. “Is that a hammer, or are you just happy to see me?”
Kidding aside, what use case does this satisfy? (No, really. This wouldn’t be the first time I missed one that’s obvious to everyone else.) I suppose you could use it to hang pictures, but I’d rather have a nice light full-sized hammer for that. It’d offer a lot more control. The mini hammer has a full-sized claw, though I’m not really sure how much force you could apply to it considering the stubby handle. It’s got to be wicked unbalanced, too.
The real piss-off is that you can find a number of these [What’s This?] kicking around Amazon, for example. Does that mean that there’s a use for them or just that they fly off the chewing-gum-and-home-magazines shelf? Enlighten me in comments if you wish. Street pricing runs about $3-5.