Thank you for viewing. Supporting your fishing life. This is a set of HEX screws to improve the maintenance of the DC unit of the 21 Antares DC, custom double ball bearings, and a full bearing set. Replacing the screws with HEX screws that are less likely to strip makes it easier to remove the DC unit, improving maintenance. In addition, adding double ball bearings and a bearing to the worm shaft aims to improve castability and reeling feel. [Set Contents] DC unit fixing aluminum screws x 2 HEX wrench for screws Stainless steel double ball bearings x 2 Stainless steel rings for double ball bearings x 2 Stainless steel bearing for worm shaft x 1 [Compatible Models] Shimano 21 Antares DC series