Use with a course thread Stainless bolt or with any length of threaded rod. An attractive strong eye which is very versatile. 316 stainless steel alloy.
3/8″ is ideal for most ready made sail applications and a 5/16″ turnbuckle will fit directly onto it.
1/2″ is heavier duty for custom size sails or large ready made sails. It will require a shackle between a 5/16″ turnbuckle and the eye as the eye is too thick for smaller turnbuckles to fit directly.