The drill press at work has a plastic holder on the side to hold the key for the chuck. It broke. I took a few measurements with some calipers and created a 3D model in OpenSCAD. I made my version a little more rugged than the original. Then I printed it on my Makerbot Thing-O-Matic 3D Printer. After a little bit of sanding to remove any sharp edges, I installed it on the drill press.