Great For Controlled Depth Trolling Durable, Corrosion Resistant Stainless Steel Blade WARNING: This product can expose you to chemicals including Lead and Nickel, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information, go to: www.P65Warnings.ca.gov The AFW Planer is an innovative and precisely balanced piece of fishing gear. A lead weight acts as a keel and balance to keep the planer running straight at controlled depths. When the planer is in the water in diving position, water pressure against the blade forces the planer down. When a fish strikes, the balance is changed. The planer then trips and produces a slight upward drag, which allows you to fight your fish rather than a heavy lead sinker.