Easy-Open Ball Bearing Cams, Multiple rows of high-load ball bearings reduce friction so cams open easily for snap-down, rather than draw-through cleating. The cam horns and smooth V-shape guide line for easy entry. This allows precise sail control without having to readjust the cleated line. The Teflon surface of the aluminum Harken Cam-Matic improves the cleat's fast line engagement. The Harken Cam-Matic is the only cleat that will engage under maximum line tension. Protective Tooth Design, Rounded teeth hold securely by squeezing rather than cutting into line to reduce wear. High-Wear or Lightweight Models, Aluminum Cam-Matics are Hardkote-anodized for high-load, high-wear, continuous adjustment applications. Available in Micro, standard and Offshore sizes. Lightweight fiber-reinforced Carbo-Cams for racing where weight is critical, or where adjustments are less frequent. Available in Micro and standard sizes. Long-Lasting Protection, Ball bearings and Carbo-Cams UV-stabilized with carbon-black additive for maximum protection.