The RAILBLAZA Fish Finder Mount R-Lock S is a platform for mounting fish finders or chart plotters with square or round bases, making them easily removable. All that remains on the deck once it's removed is a low profile RAILBLAZA mount. This 3 axis mount has friction joints top and bottom featuring R-Lock lockable joints. The center joint is fully adjustable in 15-degree increments. Will hold fish finders up to 3.3 lb. Mount on angled surfaces and have your display level! Also with the correct RAILBLAZA mount, you can mount your fish finder on a rail, or inflatable tube.