Setting a star-nut into a fork is a bit tricky without the proper tools, so reach for the Park Tool Threadless Nut Setter instead of trying to wrangle a quick fix to do the job. The inside of your star-fangled nut threads onto the bottom of the nut setter, making it easy to keep straight, and the oversized handle keeps you from pinching fingers in the process of hammering things together. This model is designed for 1-inch and 1-1/8-inch headset systems.