Simple ridged v groove holds ropes firmly yet is devoid of any moving parts to break or seize. They are unaffected by the heat generated by a rope surging back through a cleat as well as being suitable for sub-zero temperatures. Rope Size: 3-6mmLength: 48mmWidth: 15mmHole Centres: 36mmFixing Hole Size: 4mmWeight: 16gMaterial: Aluminium Click here if you need fixings