I'm pretty sure all of Kershaw's/ZT's speed assist knives can be de-assisted, just take out the torsion bar.
They can all be de-assisted, but not all have ball detents. The speedsafe serves as the detent for a number of their knives. But I believe the new ones with speedsafe have ball detents. I wouldn't quote me, though.
Yes they all have ball detents, but not all of them have the detent hole drilled into the blade.
The only new offering I've heard of that has been confirmed to have a detent when de-assisted is the 0566.
I thought I heard the 0770 had a detent hole as well. I was also under the impression all the new assisted kai products this year would have detent hole. Did I read wrong?