The Berkley Lightning Rod Shock Rods were designed specifically for superline fishing. From bass to inshore species and everything in between, anglers turn to superline when they need a near-zero-stretch line with lots of strength in a small diameter. 1K Power Helix carbon fiber material is used to produce extra strength in the backbone, necessary for the powerful hooksets and stress loads a no-stretch line produces while keeping the rods weight to a minimum for the highest sensitivity.