Urgent kitten taming question

[Kittynapper]

There's a mother cat with four kittens behind my house. They are all feral. I want to tame the kittens so the can be adopted.

I reckoned the kittens were about 8 weeks old so ok to separate from the mother so I brought three of them in. They nearly took my hands off, vicious little things. When I was catching them I heard the mother cat hiss at me and now I'm worried that they are too young to leave their mum.

Here are some photos. Are they old enough?

You definitely did the right thing!
Don’t feel bad for mum, at that age the weaning process will have been well underway. Like previous people said, the lives of feral cats are hard and short. Disease, multiple pregnancies for the females, territorial fights and lots of other dangers. Probably only one or less of the kittens you saved would make it to adulthood. If you can please trap and neuter the mum plus remaining kitten. I second the kitten lady on youtube, she has lots of experience. It seems you are doing really well already!