Ronstan's Eye strap with a 1/2 in. (13mm)-diameter ferrule is used as the saddle and is convenient for use as control line leads, block attachments, and lashing points. It has a 1/2 in. (13mm) aperture and measures 2 3/4 in. (70mm) long x 1/4 in. (6mm) wide and has an eye height equal to its aperture.