Park Tool TNS-1 Threadless Nut Setting Tool

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The TNS-1 is used to install star-fangled nuts found on threadless headsets. Thread the nut onto the TNS-1, insert into the steering column, and drive it in with a hammer. Sets the star-fangled nut to 15 mm and keeps it straight. Long handle helps prevent pinched fingers. Compatible with 1" and 1 1/8" headset systems that use a standard M6 threaded star-fangled nut Replaceable set screw — part #822 Show more