Unused I.works Original Shimano Custom Parts IOS IOS Factory I.works For Line Roller Custom Screw For Shimano Aluminum This is a Shimano line roller impact salt from IOS Factory, a unique reel tuning manufacturer. I am selling it because I only used it for a short time and replaced it with a product from another manufacturer. I think it can still be used by those who want to try it out. By improving the rotation of the line roller, the retrieval sensitivity is improved. It reduces line troubles, and furthermore, the line is wound on the spool in an orderly manner regardless of the line tension, which is excellent for stable release during casting. This is a custom line roller that allows you to experience improved flight distance with good guide release. Please check the IOS Factory website for the reel-specific compatibility chart for IOS line rollers. Ion Gold (Saltwater Compatible) A slightly subdued, bronze-like, elegant color scheme that matches any color. Included items: Line roller body, various adjustment shims, dedicated fixing screws Installation instructions (written on the package)