Update: I have added a second plate to the profile that has a model with a taller ridge on the inside that will sit flush with the FOB edge.  This will prevent as much movement as possible, but it'll be trickier to get back out. I have not had any worry of losing the FOB with the original version but I understand the concern. Hopefully this will help!  If it doesn't then I suggest giving it a nice little dad tap and saying “Yep, that's not going anywhere..”, which we all know is a rock solid method to keep things in their place. :)

Do you have one of those ugly round HID key fobs for work? Wanna jazz it up, protect it and/or make it a bit easier to put on a keychain?

I have the solution for you!

This was one of the first things I started making when we got a 3d printer. I wanted to add a layer of protection as I have seen so many worn down and broken and it also drove me nuts that the part of the FOB that is supposed to go onto the keychain was so thick and difficult to get in place. So I made this and have done lots of experimenting to optimize printing.

The print profile has it standing upright with a couple raft layers at the bottom and manually drawn supports for the holes only. In the past I have gotten it to print with only the rafts or only the hole supports, but the combination is the most reliable. Most importantly though- the object is placed near, and facing the AUX fan as this keeps the sides cooled and the layers smooth.

I suggest using the print profile because many things are intentional choices based on trial and error, but things like layer height and infill you can adjust to what you'd prefer. I've made some 100% infill, others with 15% and used silk filaments and they withstand regular use fine. The speed is slowed down just to be safe for some things, but with the addition of the supports and good bed adhesion, it may be uneccessary.

When putting in the FOB, align the rounded side of the HID FOB with the indent inside and then enjoy not having to mangle a keychain (or your fingers) to add it to your keys.