Park Tool TNS-15 Threadless Nut Setter
The TNS-15 is designed to install star flanged nuts used specifically with 1 1/4 and 1.5" headset systems. To use, simply thread the nut onto the TNS-15 and tap into the fork's steerer tube with a hammer. The TNS-15 helps keep the nut straight and sets it to a depth of 15mm.
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