The nutfix is Abus' innovative solution to preventing component theft. This stylish lock is the solution for securing bicycle components, including wheels, seat posts and saddles against would-be thieves. Its real strength lies in its design. 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. Nutfix is available in several models, including nutfix quick release, nutfix bolt on axle nuts and nutfix seat post collars.