Arrange your fish finder at the perfect angle on your watercraft with this hefty 2.25 inch ball mount. Designed for 10- 12 in fish finders. Pre-fabricated holes on top plate allow easy installation of gimbal mount brackets that come with your fish finder. The 3.25 in square base securely fastens with 0.25 in bolts. 2.25 in ball design has superior strength and reliable holding power. Constructed using engineering grade nylon and stainless steel fasteners to last a lifetime.