Made from electro-polished 316 stainless steel, these cleats have generous radiused edges to reduce line chafe and large throat openings to allow loops to pass through the base. Counter-sunk holes for flush fastening. Urethane washers included to isolate dissimilar metals. Description: Open base cleat, 316 stainless steel Length: 8" Height: 1.5" Hole Spacing: 2.0" Fastener size: 5/16"FH Weight: 19 oz.