Very cool. Little thinner than two key FOBs side by side. Definitely not for MEN. Perfect for small ladies. Id say any bigger than ring size 7 may not work comfortably for ya. But over all very cool sturdy punching wood 2x4. Minimal pressure 1/4 inch deep easy. Seems reliable no cracking or warping under punching. I would recommend this product. Its got Style and Functionality. No bs.....

very sturdy my only problem was it didnt fit any of my fingers except my pinky and the triangle link broke of easily

Absolutely love it***. My husband gave me one a few years ago. It is very durable and doesn't give the appearance of a self defense weapon but I certainly know I always have it on me. Getting 2 this Christmas for my sons girlfriends.

This is a great product. Better than the old trick of keys in a closed fist. If anyone doubts it I let them slip it on their hand and ask them to gently tap the ears in the palm of the other hand. Every time they look up in amazement at how much they will hurt. Fits female hands best.

My middle finger is a little too big for it but it still fits well enough to be used. Much better than knuckle dusters and they attract less attention.

I bought three of these. Gave one to my daughter and one to her roommate. They're very discrete. My daughter thinks it's cute. It makes her feel more comfortable when walking in the parking ramp.

My parents got me this when i was a freshmen in high school. i went to school in a tough neighborhood and a lot of students "claimed" they were carrying knives. I never brought this on or near school property :P but it definitely stopped me from being jumped a few times and most likely saved my life just by the sight of it clenched in my fist. small finger holes and doesn't fit my hand now. thats the only sad part.

The " Black Cat key chain " is a very discreet form of protection for the ladies in your life i.e. , Mother , Wife , daughter or significant other !

Got one for my wife as a gift and just got another one for my daughter. This is easy for them to carry in a purse if they need to defend themselves. This little tool should stop someone real quick if they are punched with it.

Should have read the other reviews first, this product is definitely for the ladies. I'm an average size guy, with small hands for my size, and my fingers didn't come close to fitting through the holes. A little disappointing but still it does seem like a quality product so I'll probably find someone else who could use it.