C.E. Smith 70 Series Standard Flush Mount Rod Holder - 15 Degree - Stainless Steel - Cast Bottom - Black Liner [536710C]70 Series Standard Flush Mount Rod Holder 15 Degree Stainless Steel Cast Bottom Black Liner These flush mount rod holders are made of 316L stainless steel and have a wide, low profile cap that improves the look of any boat and provides outstanding mounting strength. This model has a durable, rounded cast bottom with a hole to drain water. Features: 316L stainless steel Fits 2 3 16 in. hole diameter Cast models feature a 1 2 in. drain hole No logo on