The SRT ADJ1 model adjust preload register ferrules are made to allow the registration of the fork spring preload without the aid of a special key. Of the highest quality , are produced from an aluminum block and machined from solid metal, excellent invoice element, made with the best materials, it is proposed with an attractive design to give a racing look to the motorcycle and allow adjustment of the spring preload nut hand fork. The finishing of our rings is made by surface polishing and anodizing in various colors, questutima protects the aluminum from wear and gives a color that lasts over time. Available in the sizes 14 mm - 17 mm - 19 mm - 22 mm. The ADJ1 ferrules stabilize and secure it to the fork adjustment through a grain provided in the package. For compatibility simply measure the size of the preload register on the fork.