Harken 12mm Bolt-Down Fairlead - Single [3274]12mm Bolt Down Fairlead Single Harken Bolt Down Fairleads are used on boats 615 m (2050 ft) as shallow angle line deflectors. These weight saving fairleads are built of 6061 T6 Hard Lube anodized aluminum for durability. Smooth surfaces and radiused center holes minimize line wear. Specifications: Length (mm): 48 mm Length (in): 1 7 8 in Width (mm): 18 mm Width (in): 11 16 in Weight (g): 28 g Weight (oz): 0. 99 oz Maximum line (mm): 10 mm Maximum line