My custom designed restraining bolt from the Star Wa univee. There are several printable bolts, but I found only 1-piece things, so I decided to make one by myself in two parts, so that it's much easier to post process and to color. It also has a hole in the bottom for a small 10x5mm magnet. You can choose between a collar with or without text. If you like my desig, please coider leaving a tip!