Allows you to rotate the handlebars and a full 360 degrees without the front brake cable becoming tangled Hollow star nut design routes the front brake hose through the headset and exits at the base of the fork to avoid the cable becoming caught when rotating the handlebars Set includes a hollow bolt, star nut and laser etched "Born to Ride" aluminum top cap Compatible with all standard and tapered steerer tubes 1 1/8”