Marine-grade stainless steel pad eyes to provide a really neat fixing. Also supplied without ring . Bar Diameter Length Width Ring Interior Diameter Fixing Diameter 5 mm 45 mm 15 mm 30 mm M4 (4.5 mm) 6 mm 60 mm 20 mm 35 mm M4 (4.5 mm) 8 mm 80 mm 26 mm 45 mm M6 (6.2 mm) 9 mm 100 mm 36 mm 50 mm M6 (6.2 mm)