Measuring Tape Metal
What is the metal slot at the end of the measuring tape for? You can put it around a nail to keep it in place if you need to work on your own. It is serrated, which makes sit good for marking the surface too.
Pen Cap Holes
This is something you must be thankful for if you have a habit of chewing on your pen caps. They added holes to the design of pen caps so that you can still breathe when they swallow them by accident.