Product Description For a clean result: the TNS-1 Threadless Nut Setter by ParkTool This mounting tool is used to install the star nuts found in Aheadset and other threadless headsets. Screw the star nut onto the TNS, push it into the fork tube and drive it in with a hammer. The insertion tool places the star nut 15 mm below the upper edge of the stack. Features:positions the star nut 15 mm below the top edge of the headsetfor 1" + 1 1/8Manufacturer Number: TNS-1 Contents:1 x Manufacturer: Park Tool Company 1185 Eagle Lake Rd Shoreview MN 55126 USA info@parktool.com Distributor: GROFA Action Sports GmbH Otto-Hahn-Straße 17 65520 Bad Camberg Germany info@grofa.com