175 2.25" Ball System Top Plate for 10-12" Screens Features: Engineering-grade nylon and Stainless steel construction Compatible with all 2.25" Scotty ball system accessories The multi-hole top plate fits most popular electronics brands UV-resistant engineering-grade nylon construction Corrosion-resistant stainless steel hardware 2.25" ball joints allow for 360 degrees of rotation and 180 degrees of tilt at both ends For 10-12" fish finders Holds your device securely in extreme conditions Easy grip T-knob for loosening or tightening Designed for 1/4” fasteners (sold separately), Type: Mounting Brackets Great Product