The Titan Threadless Star Nut Setter is used to install the star-fangled nut found on AheadSet and other threadless headset systems. Simply thread the nut onto the setter, insert both into the fork column and tap firmly with a hammer. The setter sets the star-fangled nut to 15mm and keeps it perfectly straight. The setter fits 1 inch and 1 1/8 inch threadless or smooth sided fork columns.
Great tool. Drives your star nut in straight and easy every time. If you build your own bikes, you need a star nut setter. This one works better than models costing twice as much.