Ronstan's Eye strap with a 13/32 in. (10mm)-diameter ferrule is used as the saddle and is convenient for use as control line leads, block attachments, and lashing points. It has a 13/32 in. (10mm) aperture and measures 1 7/16 in. (37mm) long x 3/16 in. (5mm) wide and has an eye height equal to its aperture.