There's no need to carry a freewheel remover or risk opening your brakes to make it home. String up the FiberFix Spoke using the simple instructions. Turn the device with the provided spoke wrench to the desired tightness, tie off the excess cord and you're ready to ride. The strong Kevlar cord will get you to your destination on a road ride or backcountry adventure. Weight: 0.5 oz Materials: plastic container / metal screw, nuts / kevlar cord Installation instructions and further information is available here.