Note: open box.
NutFix is the new and stylish solution for securing bicycle components. The NutFix system can protect both wheels and the seat post against would-be thieves. Its real strength lies in its special functionality. The nut is fitted with a mechanism that only releases the screw below when the bike is on its side. This means it is not possible to access the screw unless the bike is on its side. The solid axle security solution for screw diameter M9, M10, and 3/8”. The secure locking innovative, gravitational technology has an anodized surface cap that provides long term protection against corrosion. The nuts themselves are manufactured from high quality stainless steel and are easily installed with a conventional SW-15, open jaw wrench.