Step 5Drilling the holes (optional but looks way cooler)
iImage Information

Now if you have a drill press, this step will be a breeze. If not, then, like me, you just have to be careful. You are going to be drilling at inside star points. It's kind of hard to explain, so look at the image for reference. You are going to use the 3/8" drill bit for these holes. If you don't have a drill press, it would probably be easier if you use a bit about half the size to drill a hole first. It's hard to get a big bit to go exactly where you want in one shot. You can be more precise with smaller bits. Also, if you want to counter any wind blowing it off target, drill a hole in the center.
This looks kinda like a metal handle with a sharp pin coming out of it, and it's sprung load so that it will 'click' when you press it all the way down, creating a small dent in the metal.
Should be easy to find at any hardware store.