The TNS-4 makes it quick and easy to install star-fangled nuts used with 1"" and 1-1/8"" threadless headset systems
Using a durable steel driver and built-in guide, the TNS-4 perfectly aligns the star-fangled nut and sets it to the proper depth every time
The unique design virtually eliminates pinched fingers
Made in the USA and covered by Park Tool's legendary limited lifetime warranty