Ultra lightweight for high performance boats. Carbon black Delrin ball bearings. Lightweight carbon fiber-reinforced Carbo-Cams® for racing where weight is critical, or where adjustments are less frequent. Ball bearings and Carbo-Cams® UV-stabilized with carbon-black additive for maximum protection. Working Load: 150lb. Breaking Load: 300lb. Max line diameter: 1/4". Min line diameter: 1/8". Fasteners: #8 TH. Weight: 9/16 oz.