The newest edition to our ball mounting system is the 1 ½” ball mount. The bigger ball design gives you a much greater clamping force for larger accessories while still having a smooth full range of motion. The 163 top plate has been designed to accept large fish finders.
Base Mount Dimensions: 2 ¼” x 2 ¼”
Not like a Ram Mount. The tightening connection is not forgiving for space to tighten it down. Will not hold the weight of 800 series or 9" Helix Series finders. The mount is not tall enough to get a good grip on tightening to the ball. There is nothing better than the Ram mounts that I have found. I tried this due to it being $40 cheaper. Not a good choice. The bracket holes are great, just did not work for my application.