MY wife bought me a Dewalt cordless,keyless 6 years ago . It's 1/2" , reversible , hammer drill , setting for screws (tork)
It is powerful enough to "wrench" itself out of my hands or spin me on my butt if its on high tork setting.
Anyway the keyless part works great and ya don't have to hold one ring while ya tighten the other ring.
It was over $300.oo but its still works and it gets used at least once a week unless I'm on a ride somewhere.
I have several other cordless , keyless , 3/8" , lighter-weight drills (3) for running nuts and bolt , working on vehicles and running screws for hanging pictures and such . They are handy but they aren't real work-horses like the big
Clidadale Dewalt is
Harbor Freight has a 12volt cordless/keyless with a triangle looking battery that tightens up good and ya don't have to hold one ring while ya tighten the other one. Extra batteries are only $20.oo . The one I have is Blueish/black . I have one from Wal-mart Tough something 18Volt , but ya have to hold one ring while tightening the other and its light weight but a good nut-runner. It hold the bit good.
Perhaps the newer ones have "Fine" threads on the keyless and the older ones had "Course" threads on the keyless chucks.