Machined AISI 304 Stainless. Sea-Dog Bow Eyes come with adjustable finished nuts as compared to the crimped ring used on most other bow eye. The 3/8" and 7/16" shafts have rolled threads. All parts are made of stainless steel. Plate sizes: 080031-080035: 2-1/4" x 3/4" (both plates); 080055-080085: 3" x 3/4" (both plates).