This is a little pocket screwdriver tool that doubles as a DB9-22 assembly tool. 

You can put a hex bit in either end and there's also a slot in one end to put a quarter for extra grip. One version has a hole for putting it on a keychain. The other is a pocket clip variant. 

Print laying down on it's narrow side with small layers (I used .08) to keep the fit of the hex. If printing the clip version, make sure to use supports on the clip. Depending on your printer/settings, you may need to scale it up or down a percent or two to properly fit the bit.