This pad eye with ring is made from grade 316 stainless steel for maximum corrosion resistance and durability. Marine Grade Stainless Steel 316 Square Eye Plate with Ring 5/16" Base: 1.96" x 1.58". Height: 1-1/4". Wire Diameter: 1/16". Ring Diameter: 1-3/4" Perfect for sailing, boating, and many other marine and rough weather applications.