This low-friction fairlead is suitable for mounting on mast, boom and thin wall with no access from behind. Aluminium made, hard black anodized and highly polished to guarantee minimum friction. 3 sizes with 14, 16 and 18 mm holes for lines up to 10, 12 and 14 mm max. Just drill a hole of appropriate size (30,35 or 40 mm for the different models) insert the fairlead into this hole and fix it with two screws (included).