This

Used it all day hogging screws out of extruded aluminum fence, just the right fit to get the screws out between the posts, a lot of switching between 1/4" and 5/16", and this only holds bits in with a magnet so it made switching a little faster. Had it for a while, never really used it, but today I needed it. I had it in my toolbag, didn't bring it on purpose today, so glad I had it in there. It's an odd thing but I definitely recommend it if you need it, put whatever bit in it, usually have to hold it with your other hand if you want to apply any force. Thank you God for this thing.