The oversized "S" shaped horns are easy to loop and designed to accept oversized lines/6-1/8"（10inch） center to center mounting holes.Uses 1/2" fasteners (not included).Measures 12 inches, 6 1/4 inches center to center. Measures 15 inches, 7-1/2 inches center to center . /Well designed cleat features recessed mounting holes to eliminate line snag and fray without sacrificing strength and durability. 10/12/15" overall length.