This heavy duty aluminum rod holder is perfect for any application where you wouldn’t want to hold your fishing rod. This is great for any boat, plane, dock or pier! This aluminum won’t rust around the use of salt water and will be much more durable and last a lifetime instead of using the cheap plastic rod holders that will bend or break over time. This rod holder will stand up to anything you throw at it, including harsh salt or weather conditions. These Aluminum rod holders are solely produced by us, Marine Fiberglass Direct, which means you will not find these anywhere else. High quality 6063-T5 Mill finish aluminum. Approximate total height – 9-7/8. White liner height – 8-1/2. Locking pin located at the bottom of rod holder. (without liner) 1-7/8 inside dimension (with liner). BOTTOM: 1-5/8 [1.625] inside dimension. Flat plate mount dimensions: 4″ W x 3″ H; Screw hole pattern: 3″W apart and 2″ H (+/-) ; 1/4 Hole size. Rod holder distance from flush mount: 2-1/8 (+/-). This rod holder is produced by Marine Fiberglass Direct and is proudly made in the USA. We will surely solve the problem for your satisfaction. Please give us a chance to make things right before any negative or neutral feedback left. It is very important to us to make sure you get what you want.