This rod holder for fresh or saltwater made of a marine board and stainless steel hardware. Each hole is 1-1/2″ and the bottom hole has a 1-1/2″ set hole to keep rods in place for vertical storage. Rod holder has holes in base if you would like to screw in down on your dock. Heavy-duty marine board construction Capable of holding up to 18 rods Indented base allows rods to sit flush Perfect for garage or dock storage. Keep your lines untangled and organized! Incredible quality, very well designed and materials including hardware are second to none! This rack is everything I wanted and exceeded my expectations. Perfect for big salt water rods and reels plus very easy assembly that goes together simply and in a manor that you can’t mistakenly put the wrong part in the wrong spot, everything is uniform. Just make sure you have a very large Phillips head screwdrivers or get one. I lucked out by having a full set of Snap On Screwdrivers. A+ #1 Dev Fishing Rod & Reel Storage Dock Garage Rack Pole Organizer Outdoor Stand (# ) Buyer: ( ) US $179.99