Removable screw-in pad eyes are ideal for attaching blocks which can be removed when not in use or while cruising. A threaded plug remains in the base section when the top plate is removed to prevent dirt and debris from entering the threads. Grade 316 stainless steel.Base Dia: 2 27/32Inside Dia: 3/4Ring Dia: 13/32Fastener Dia: 5/16Breaking Strength: 11,020lbWeight: 19.4oz.