I needed to buy some rubber pucks to safely jack up my car without crushing the frame rails. This is common on Corvettes, BMWs and other sports cars. I wanted a way to easily index the rotation of them (twist 90° to remove) and I wanted to be able to add a visual reminder to remove them before driving away.

I bought the rubber stands (4-pack) and keychains (5-pack) on Amazon.

I printed in TPU and used a soldering iron to poke the hole for the keychain. I attempted to print with a hole integral to the design, but it lead to an uglier print, plus melting the hole afterwards makes it more robust. Superglue bonded very well between the rubber puck and the TPU (base bends easily to the circular shape of the puck)