A big honking reflex hammer.
931287
This is an excellent reflex hammer - the round head and the long stem mean you get the reflex the first time, every time.  It also has a "sharp" tip at the end which isn't very sharp, and not particularly useful where sharp sensations need to be discriminated from dull sensations - a neurological hammer with a brush and pin are a better choice if you need that.  Only reason I am not giving this a 5 star is because I found a hammer that is even longer with a flexible stem.  You won't go wrong though, with this "combat reflex hammer."
1379035
Big bad hammer for line work.  Heads up guys it's fairly heavy but I prefer that in my hammer.  Just take notice it is 28 ounces.
1892596
Nice heavy hammer, great for chasing copper to make bracelets and I'm sure other applications calling for a chasing hammer.
1806952
This works better than my earlier model, and holds more, but it is LOUD, with a particularly penetrating scream.
1200692
Honk honk beep beep steppin on the gas
Cutting off a greasy granny in the lane of pass
See me in my red hot rod burnin rubber hard
Going past a bus stop saying ha Haaaaaaaaw
Cuz I have car!
3259891
The horns are terrific. They replaced the anemic RAV4 ones that came on the car. Now at least, someone will know I was honking at them if the time comes.
418953
Music was nerve racking. It was like squeaky wheels on a grocery cart. It was a jack hammer on a Sunday morning. I couldn't wait to shut it off and throw it away Oh what a relief it was!
3209977
These are very loud, very loud. Built only for bike handles but gets the job done. If it wasn't so loud I would give it more stars. Or if it had volume control.
298835
Much better than the cheap $5 reflex hammers. With this hammer you can easily get a patellar reflex on yourself and on almost all patients. I highly recommend this product to healthcare workers, especially medical students.
1931117
The hammer is light, yet drives nails great.. Used frequently on numerous projects  20 OZ is perfect. i Would definitely recommend it.
217207
It does it's job, and the price was right, it's pretty hard to get excited about a reflex hammer, yes I would recommend this item!
1193531
This works astoundingly well and even cars will slam on the brakes when you blast this high pressure air horn.  Don't use it on pedestrians.  They'll poop their pants!  It has held up very well and can take more than 80 psi of pressure from any air hose.
673178
I use this while riding my bicycle it is better than a horn hand very loud
792421
I needed a small hammer and this is a small hammer. Good!
810305
It's a pretty good hammer, I guess, but I don't really use it. The problem is, I work on cars, and this hammer simply absorbs too much of the shock when hitting metallic parts. Thus, it is really of no use when I am attempting to jar frozen parts loose, which is really when I need a heavy hammer. It is definitely a lot quieter than metal on metal, so if you can find a use for it, good for you!
924144
It does it's job, it's a little loud though.
2329765
This is a little amp with alot of punch!  My SIL had it installed in his Honda Civic.  Only turned up half-way the trunk rises and the license plate rattles.........lots of power.  I was impressed with the power, not the trunk and license plate shaking.