They open a smaller hole in a can than do ...
926569
They open a smaller hole in a can than do more expensive brands. I prefer the more expensive ones because they open bigger holes in cans, I'm returning these for that reason. You get what you pay for.
4642775
It is kind of tricky to get the can in the right location and then to have it cut the whole can in one attempt.
1905332
As others said, once you close it, its near impossible to open. They need a grip or handle of some sort to open it. Seals/freezes shut.
3480322
I wish the holes were larger, so you could fit an M6 bolt through them. You cant really drill them out ether, as they are swedged together.
3498675
Can is supper  small for the price. But it does the job
3716244
They need smaller sized packaging once you open the pack you have no way of resealing.
2585099
They are a bit smaller than you would think.
178874
I bought this hoping to get out the smaller poop particles in the cat litter box but the holes are actually too small! There needs to be one that a person can buy that is between this one and a regular litter scoop.
3329250
I had 3 cariboo balls and needed 3 more, these are considerably smaller. They work but need a push at the end to make the treasure box open.
4282624
I have no idea how this thing has so many five star reviews. It doesn't ever open a can in one go. I clamp it on and start cranking and halfway round, it begins to "walk" off the edge of the can and stops cutting. It distorts the can and makes it almost impossible to go back and cut through. If you're lucky, it'll only do this once and you'll be able to pry the lid up with a knife. If you aren't lucky, you'll have to go back and muscle your way through the distorted metal to get to the contents. So disappointing.
558284
They have rings built in of varying sizes so that they probably work with most different size cans. I was happy that they work on the smaller Fancy Feast cans.
4495336
One end of the can is smaller than the other, open both ends for easy removal of product. Tastes real good and is great to have on hand.
3221592
Can opener works great. Bottle opener is marginal.
1488095
Many years ago in a country far away in Southeast Asia, the military had these issued to open canned goods.  These are a bit larger and easier to use than the original openers, but the same principal applies.  I put one on my key chain so it would be ready at a moments notice.  These beat the old manual rotary can openers and don't have the drawbacks seen in the common household can opener.
101982
These strainers were made in Korea and are made for cans that are smaller than U.S. cans.  They were too small to even drain a small-sized tuna can, which is what we purchased them for.  They would probably fit a small cat-food canbut why would you strain cat food?  The only reason they got 1 star is that at least one star is required to publish the review.
793536
I was using a butter knife and a rock to open cans. This works much better and I spill a lot less food. Its also cut down on trips to the ER for me and my wife.  Ain't science great.
1845786
The smaller can works well for very young bottle-fed orphans because they usually don't consume all of a larger can before it expires.