Thanks, all, for the info on Original Wave vs. New Wave differences. I have had an incident or two where one of the screw drivers has folded on me while in use on super tight screws. Not the end of the world, but painful if your fingers happen to be in the way. At least the blades lock on the Original Wave, which is the bigger safety issue. The solution may not be to buy a new tool, it may be to be more aware when using the one I already have. Thanks.