The trouble with most tweezers when card making is that you need to keep a firm grip whilst you transfer the small pieces you are using into position. Maybe I just don’t have a steady enough hand but I always seem to drop whatever I have in the grip of the tweezers before I get to where I want to place it.
The angle on the angle locking tweezers makes it easier to pick up small items, especially things like small punched shapes, and then the pressure on the tweezers snaps the locking mechanism into place. When you want to realease simply run your thumb down the side of the tweezers and press on the little mechanism to release the object. Job done!

