The park tool tns 4 deluxe threadless nut setter makes it quick and easy to install star fangled nuts used with 1 and 1 18 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 replaceable set screw 822 park tool tns 4 deluxe threadless nut setter features using a durable steel driver and