Ronstan's Narrow Top Eye Strap has a 3/8 in. (9mm) interior diameter and a matching eye height. It is 1 1/16 in. (27mm) long and 1/8 in. (3mm) wide. Made from grade 304 stainless steel, it is stiff and strong and is used for multiple purposes including control line leads, blocks attachments, and lashing points. We recommend it be used with a RF5000 cam cleat.