The 13 Fishing Zero Bearing Kits allow you to upgrade your favorite 13 Fishing Reels to the next level of performance, with increased smoothness, feel, and casting distance. 13 Fishing Zero Bearings are designed from a space age grade polymer that take the place of traditional ball bearings in baitcasting reels. Not only do Zero Bearings reduce friction and noise, they also offer an enhanced smoothness that will greatly improve your casting distance. With farther casts, bass are no longer safe in remote spots of your favorite lake.