ICS Compression Kit

Utilise this kit to achieve consistency between your bar and fork.

This Compression Kit comprises a star nut and bolt.
Suitable for threadless forks and ensures a secure fit with a threadless headset.

The star nut is positioned inside the bar (on District bars, a star nut is factory-installed inside; you will still require the bolt). You then secure the bolt from the bottom to the top of the fork using a long allen key.
Also check out this instruction video

Designed for District forks, yet it is feasible to fit other brands as well.
Please note: Does not fit Blunt Envy forks as they necessitate a much longer bolt (you can address this by purchasing a 300 mm long 6mm threaded rod and several nuts, and utilise this along with the District star nut)