The Park Tool Threadless Nut Setter is an essential tool for installing star-fangled nuts in 1" and 1-1/8" threadless headset systems. Designed for ease of use, this tool features a durable steel driver and a long handle that helps prevent pinched fingers during installation. Simply thread the nut onto the setter, insert it into the fork stack, and tap it in with a hammer. The TNS-1 ensures the nut is set to the correct depth and remains straight, making it a reliable choice for both professional mechanics and DIY enthusiasts.