Almost all the keys are the same. I have a lot of experience with hot swap drive bays and have installed a LOT of them. Kingwin is inexpensive, but still built decent and works. They're close to knockoffs of the rhino jr. (cru dataport) carriers.
Don't take my word for it, but I have a good feeling that the keys will be interchangeable. Check out the KF-811-BK if you want a model that comes with keys, or the KF-92-BK if you want one without.
A lot of the hot swap carriers come with keys because end users are notorious for taking a bunch of hard drives out and forgetting what slots they go back into. This has broken many a raid. It's to make sure that only an administrator can deal with it. It's fairly unnecessary for home use, but don't turn your windows hard drive off accidentally while the computers running. Made that mistake more than once.... LOL
If you wanna go dirt cheap I have actually had a positive experience with this one:
But the on/off function is a button you push. One of my friends mistook it for a cdrom drive and of course, turned off my boot drive : (
Edit: if I recall the main difference between the keys is that some are 5 pin barrel keys and some are 4 pin barrel keys. All the pins are the same height, nothing fancy. You could probably get the key to turn of you had a piece of tubing to push the pins in and a flat head screw driver to turn the lock.Edited by mobius9 - 2/22/12 at 10:54pm