Wichard's Reefing Eye strap is drop-forged out of high-quality grade 316L stainless steel to provide outstanding strength when the wind and sea state is up and reefing is a necessity. It has a 13/32 in. (10mm) inside diameter and a 1 3/8 in. (35mm) inside length. The distance between the fastener holes is 9/16 in. (14mm). Use #12 fasteners for this 3/4-ounce (19g) reefing eye strap.