Casting rods are designed to be used exclusively with baitcasting (or casting) reels, which mount to the top of the rods. The mechanics of baitcasting reels allow for great line control and casting distances - casting rods are an extension of this capability. Casting rods have attached line guides, so they feed the line directly to and from the spool of the reel. This helps avoid significant friction from contact with the guides, which is an unwelcome characteristic of spinning rods.