They are sold as a pair and you simply pull the existing caps from your hub and push these ones on

anti-corrosion and long-lasting grease

Internal width: 30mm

Pros: An affordable high powered light that offers the ability for custom settings to dial it in to suit your needs with a range of mounting options out of the box

there is conductive thread on the index fingers and thumbs

Park TNS-1 Star Nut Setting Tool - 1 1-8th Inch Replace Images They are sold as aInstalls a new start nut in a few easy steps. If you've purchased a new fork, you'll need this tool to install a new star nut. The Park Threadless Nut Setter is built to last and uses a long handle to protect your fingers. To install a new star nut: Thread the new nut onto the tool. Centre on top of your steerer tube. Tap with a hammer go slow to ensure it stays straight. Sets star nut to 15mm. Compatible with 1" and 1 1 8" headsets steerer tubes.