Gears of War Cog Tags

This is my first instructable  and these are my cog tags from the video game Gears of War.
My cog tags are made out of 3mm aluminum and were both engraved and cut out using a CNC Mill

Materials
-3mm Aluminum
-chain, string

Machines Used
-CNC Mill
-Buffing Machine

Step 1: Engraving and Cutting Out

First i engraved the aluminum and then cut it out on the CNC mill.
I used a 60 degrees vbit for the engraving and a 3mm ball nose bit for the cut.
Found that cutting it out at a slower speed gave the best results.

Step 2: Sanding and Polishing

I then filed Down any sharp and uneven edges and sanded it with wet n dry sandpaper starting with 240 then on to 360, 600 and finally 1200
I then went and polished it on a buffering wheel

Step 3: Finished

Now just attach the string or chain and wear