In metal, we made a drill gauge the one the left is the commercial one and the one on the right is what the outcome was when we finished.
With the tools in the photo, we used them for marking out. we used the ruler to make sure the dill gauge was at the right length what was 110mm, we used the engineer square to make sure the top of the drill gauge was falt when we were filing down to 110mm if it wasn't falt you would see a gab and then you could tell what side of the drill gauge to file. We got to chose to use a vernier to measure our drill gauges and here is a video that shows you how to use a vernier https://youtu.be/FNdkYIVJ3Vc. The micrometer is to measure how big or small the drill is this video will show you how to measure https://youtu.be/2-cm_ocn9p4. the very small thing tool is a double-ended scriber when you use it you put engineering ink on it and make a line where to cut it. the one at the top is called a spring divider that is to help you put a half circle of the top or your work or just to make a circle.
these drills are the ones that we used to drill the hole they are called HSS{high speed steal} and we learned about speeds and why using them cause if you don't get the right speeds and feeds you could damage your work or the drill. larger diameter drill bits do require to have a slower speed to avoid cutting or burning. if you go to this youtube video it will show you how speeds and feeds work https://youtu.be/zzzIpC39WUg
with these tools that we have the small one is called a countersink which it used to help you with drilling cause you have your drill gauge on a metal table you use the hammer to hammer the top part which is the flat side and then when you do that it put a little hole in it so the tip of the drill is easier to line it up where you want to drill the hole.
tinkered design
In metal, we made a drill gauge the one the left is the commercial one and the one on the right is what the outcome was when we finished. 
