When I opened the bag, I was dumbstruck by how flimsy these were. "As thin as an eggshell," I thought. So I actually cracked open an egg for comparison: 22 thousandths of an inch. The thinnest of these measured a marginally thicker 38 thousandths, still a cruel joke. Somewhere a bean-counter who's never had to use one of these is laughing himself hoarse. So I spent twenty cents less for the competing "Cache Plus Faucet Aerator Key and Removal Wrench Tool" which, while still plastic, is significantly beefier: The thinnest-wall size was still 58 thousandths thick, 52% thicker. While not quite a tool you can count on leaving to your grandson, it's more likely to survive a couple dozen faucet screen cleanings. Mine made short work of the nine screens in my house last evening. Don't waste your time with this dime-store reject.

The green key is what I needed for my new faucets. You need a steady hand to keep it aligned. It does work and shows little wear (though if you are too aggressive with this tool, it will strip).

these actually work for what they are intended and the surprising part is that the faucet is not much worth taking out the aerator since it wasn't really working in the first place.

Did not fit our faucet filter screen... can't seem to find the size. Money wasted.

These work great. Wish they were metal though for durability.