The Threadless Nut Setter is used to install the star-fangled nut found on 1â and 1-1/8â threadless headset systems. Thread the nut onto the TNS, insert into the fork stack, and tap it in with a hammer. Sets the starfangled nut to 15mm and keeps it straight. Long handle helps prevent pinched fingersReplacement Nut setter Screw6mm Screw822